Find the Enthalphy of helium if its internal energy is 200 kj/kg

Find the pressure at the 100 fathom depth of water in kpag.

Find the depth in furlong of the ocean (SG = 1.03) if the pressure at the sea bed is 2,032.56 kpag.

A 1mx 1.5m cylindrical tank is full of oil with SG = 0.92. Find the force acting at the bottom of the tank in dynes.

Find the mass of ten quartz of water

What is the approximate value of temperature of water having enthalpy of 208 Btu/Ib?

Camot cycle A, B, and C are connected in series sa that the heat rejected from A will be the heat added to B and heat rejected frorn B will be added to C, each cycle operatesbetween 30°C to 400°C. If heat added to A is 1000 kw, find the work outpit of °C

Two kilogram of air in a figid tank changes its temperature from 32°C to 150°C. Find the work done during the process

Determine the atmospheric pressure at a location where barometric reading is 740 mm Hg and gravitational acceleration is g = 9.7 m/s?. Assume the temperature of mercury to be 10°C, at which the density is 13,670 kg/m³

A certain gas at 101.325 kPa and 10°C whose volume is 2.83 m³ are compressed into a storage vessel at 0.31 m³ capacity. Before admission, the storage vessel contained the gas at a pressure and temperature of 137.8 kPa and 26°C, after admission the pressure has increased to 1171.6 kPa. What should be the final temperature of the gas in the vessel In Kelvin?

A perfect gas has a value of R = 58.8 ft-Ib/Ib-°R and k =1.26. If 20 Btu are added to 10 Ibs of the gas at constant volume when Initial temperature is 90°F, find the final

Ammonia weighing 22 kgs Is confirmed inside a cylinder equipped with a piston has an initial pressure of 413 kPa at 38°C. If 3200 KJ of heat is added to the ammonia until its final pressure and temperature are 413 kPa at 100°C, respectively: what is the amount of work done by the fluid in kJ

A tank contains 90 ft of air at a pressure of 350 psig. If the air is cooled until its pressure and temperature decreases to 200 psig and 70°F, respectively, what is the decrease in Internal energy?

A large mining company was provided with a 3 m³ of compressed air tank. Air pressure in the tank drops from 700 kPa to 150 kPa while the temperature remains constant at 28°C. What percentage has the mass of air in the tank been reduced?

A 4 m³/hr pump delivers water to a pressure tank. At the start, the gage reads 138 kPa unil it reads 276 kPa and then the pump was shut off. The volume of the tank is 180 liters. At 276 kPa the water occupied 2/3 of the tank volume. Determine the volume of water that can be taken out until the gage reads 138 kPa.

Atmospheric pressure boils at 212°F. At the vacuum pressure at 24 in Hg, the temperature is 142°F. Find the boiling temperature when the pressure is increased by 40 psia from atmospheric.

Find the work posses for a Helium gas at 20 deg C.

What is the hydraulic gradient of a 1 mile, 17 inches inside diameter pipe when 3300 gal/min of water flow with f = 0.003

Air Is compressed adiabatically from 30°C to 100°C. If mass of air being compressed is 5 kg. And the change in entropy

A steam condenser receives 10 kg/s of steam with an enthalpy of 2770 kJ/kg. Steam condenses into a liquid and leaves with an enthalpy of 160 kJ/kg. Cooling water passes through the condenser with temperature increases from 13°C to 24°C. Calculate the water flow rate In kg/s.

If the initial volume of an ideal gas is compressed to one-half its original volume and to twice its temperature, the pressure:

If the pressure of a confined gas at a constant temperature is tripled, what will happen to the volume?

A double purpose tank 18 ft wide, 24 ft long and 4 ft depth is filled with water. What is the weight of water in the tank in long tons?

The equivalent weight of mass 10 kg at a location where the acceleration of gravity is 9.77 m/sec2.

A transportation company specializes in the shipment of pressurized gaseous materials. An order is received from 100 liters of a particular gas at STP (32°F and 1 atm). What minimum volume tank is necessary to transport the gas at 80 °F and maximum pressure of 8 atm?

How much does 30 lb, weigh on the moon? (9moon = 5.47 ft/s²).

An oil storage tank contains oil with specific gravity of 0.88 and depth of 20 meters. What is the hydrostatic pressure at the bottom of the tank in kg/cm2?

What is the absolute pressure exerted on the surface of a submarine cruising 300 ft below the free surface of the sea? Assume specific gravity of sea water is 1.03.

Find the density of oil with a specific gravity of 1.6 in g/cm3.

The tank of an air compressor has a volume of 3 ft3 and is filled with air at a temperature of 40 °F. If a gage on the tank reads 150 psig, what is the mass of the air in the tank?

Determine the degrees of superheat of steam at 101.325 kPa and 170 °C.

Determine the quality of steam in a vessel containing 2 kg of saturated vapor and 8 kg of saturated liquid.

One kilogram of air is compressed adiabatically and in a steady-flow manner. The compression efficiency is 80% and the work done on the air is 265 kJ/kg. Compute the heat

Three-hundred kilojoules of heat flow by conduction from the outside to the inside of a cold storage in one hour. If the temperature and all other conditions are the same, what is the heat flowing through the cold storage room in two hours?

Two Carnot heat engine operate in series between a source at 527°C and sink at 17°C. The first engine rejects 400 KJ to the second engine. If both engines have the same efficiency. Calculate the source the temperature for the second.

A Carnot cycle engine has a sink temperature of 45°C. Its thermal efficiency is 48.20%. The heat rejected is 742 KJ/min. Determine the power output in KW.

Consider 1 kg of air at 32°C that expanded by a reversible polytropic process with n = 1.25 until the pressure is halved. Determine the heat transfer. Specific heat at constant volume for air is 0.1786 kJ/kg.K.

One kilogram of air is compressed adiabatically and in a steady-flow manner. The compression efficiency is 80% and the work done on the air is 265 kJ/kg. Compute the heat.

Three hundred kilojoules of heat flow by conduction from the outside to the inside of a cold storage in one hour. If the temperature and all other conditions are the same, what is the heat flowing through the cold storage room in two hours?

The gain of entropy during isothermal nonflow process of 5 lb of air at 60°F is 0.462 Btu/R. Find the V1/V2

A 50 kg block of iron casting at 500K is thrown into a large lake that is at a temperature of 258 deg K. The iron block eventually reaches thermal equilibrium with the lake water. Assuming average specific heat of 0.45 KJ/kg-K for the iron, determine the entropy generated during this process.

A heat engine receives heat from a source at 1200 deg K at a rate of 500 KJ/s and rejects the waste heat to a medium at 300 deg K. The power output of the heat engine is 180 KW. Determine the irreversibility rate for this process.

A dealer advertises that he has just received a shipment of electric resistance heaters for residential buildings that have an efficiency of 100 percent. Assuming an indoor temperature of 21 deg C and outdoor temperature of 10 deg C, determine the second law efficiency of these heaters.

A rigid tank contains 2 kmol of N2 and 6 kmol of Co2 gases at 300 Deg K and 115 Mpa. Find the tank volume using ideal gas equation.

An elastic sphere containing gas at 120 kPa has a diameter of 1.0 m. Heating the sphere causes it to expand to a diameter of 1.3 m. During the process the pressure is proportional to the sphere diameter. Calculate the work done by the gas in KJ.

An ideal gas with molecular weight of 7.1 kg/kg mol is compressed from 600 kPa and 280 deg K to a final specific volume of 0.5 m3/kg. Calculate the work of compression in KJ/kg?

A 12 DC electrical motor draws a current of 15 amps. How much work in KJ does this motor produce over a 10-minute period of operation?

An insulated box containing helium gas falls from a balloon 4.5 km above the earth's surface. Calculate the temperature rise in deg C of the helium when box hits the ground.

Consider two Carnot heat engines operating in series. The first engine recelves heat from the reservoir at 2400 deg K and rejects the waste heat to another reservoir at temperature T. The second engine receives heat by the first one, convert some of it to work, and rejects the rest to a reservoir at 300 deg K. If thermal efficiencies of both engines are the same, determine the temperature T.

Helium gas in an ideal Otto cycle is compressed from 20 deg C and 2 L to 0.25 L and its temperature increases by an additional 800 deg C during the heat addition process. The temperature of helium before the expansion process is:

A water reservoir contains 100,000 kg of water at an average elevation of 60 m. The maximum amount of electric power that can be generated from this water is:

Determine the temperature for which a thermometer with degrees Fahrenheit is numerically twice the reading of the temperature in degrees Celsius

During takeoff in a spaceship, an astronaut is subjected to acceleration equal to 5 times the pull of the earth's standard gravity. If the astronaut is 180 Ibm and the takeoff is vertical, what force does he exert on the seat?

A pressure cooker operates by cooking food at a higher pressure and temperature than is possible at atmospheric conditions. Steam is contained in the sealed pot, with vent hole in the middle of the cover, allowing steam to escape. The pressure is regulated by covering the vent hole with a small weight, which is displaced slightly by escaping steam. Atmospheric pressure is 100 kPa, the vent hole area is 7-mm2, and the pressure inside should be 250 kPa. What is the mass of the weight?

A barometer can be used to measure an airplane's altitude by comparing the barometric pressure at a given flying altitude to that on the ground. Determine an airplane's altitude if the pilot measures the barometric pressure at 700 mm-Hg, the ground reports it at 758 mm-Hg, and the average air density is 1.19 kg/m3. g = 9.8 m/s2.

A mixture of 0.4 lbm of helium and 0.2 lbm of oxygen is compressed polytropically from 14.7 psia and 60°F to 60 psia according to n = 1.4. Determine the Polytropic work.

A turbine receives 150 lbm/sec of air at 63 psia and 2450°R and expands it polytropically to 14.7 psia. The exponent n is equal to 1.45 for the process. Determine the power.

An adiabatic tank containing air is used to power an air turbine during times of peak power demand. The tank has a volume of 500 m3 and contains air at 1000 kPa and 5000K. The temperature at this instant.

How many hours would it take to boil down 1.2 kg of water in a kettle if a constant supply of heat at 1.25 KW is supplied to the kettle?

Steam enters a turbine stage with an enthalpy of 3700 K/kg and a velocity of 80 m/s and leaves with an enthalpy of 2864 KJ/kg with a velocity of 128m/s. If the rate of a steam flow through the turbine if 0.44 kg/s, what is the work done in KW?

During a reversible process there are abstracted 317 KJ/s from 1.134 kg/s of a certain gas while the temperature remains constant at 26.7°C. For this gas Cp = 2.232 and c = 1.713 kJ/kg.K. The initial pressure is 586 KPA. Determine the final volume flow rate.

Determine the atmospheric pressure at a location where the barometric reading is 740mm hg and the gravitational acceleration is g = 9.81m/s2. Assume the temperature of mercury to be 10°C, at which its density is 13,570 kg/m3.

Which of the following are not units of pressure?

One hundred milliliters of water in a plastic bag of negligible mass is to be catapulted upwards with an initial acceleration of 20.0 m/s2. What force is necessary to do this? Assume that gravity is 9.81 m/s2 and the density of water is 1 g/cm³.

Air has specific heat (cp) of 1 kJ/kg.K. If 100 g of air are heated with 1500 W heater, which of the following occurs? I.The air heats up at a rate of 15 K/s. II. The air reaches a final temperature of 15000 K. III. The air undergoes a nonisentropic process.

If a 1/3 horsepower pump runs for 20 minutes, what is the energy used?

A machine is capable of accelerating a 1 kg mass at 1 m/s2 for 1 minute. The machine runs at 60 rpm. What is the power output of the machine?

An engine has an efficiency of 26%. It uses 2 gallons of gasoline per hour. Gasoline has a heating value of 20,500 BTU/Ibm and a specific gravity of 0.8. What is the power output of the engine?

In a Carnot cycle engine, the volume after adiabatic compression is 8.5% of that before the compression. The sink temperature is 30°C. Determine: thermal efficiency.

Water is being in a closed pan on top of a range while being stirred by a paddle wheel. During the process, 30 KO of heat is transferred to the water, and 5 KJ of heat is lost to the surrounding air. The paddle-wheel work amounts to 500 N-m. Determine the final energy of the system if its initial energy is 10 K).

Consider 1 kg of air at 32°C that expanded by a reversible polytropic process with n = 1.25 until the pressure is halved. Determine the heat transfer. Specific heat at constant volume for air is 0.1786 kJ/kg.K.

A Carnot cycle is represented by a rectangle in a Ts diagram that operates between temperature limits of 300 °K and 650 °K. Inscribed within a rectangle is a ellipse of maximum major and minor axes, represents a cycle and operating at the same temperature limits. Considering that the major axis of the ellipse is two times that of its minor axis. Determine the thermal efficiency of the cycle represented by an ellipse.

If an airplane is flying at an altitude of 5 800 ft, what is the approximate atmospheric pressure at the said altitude?

Air at 1 MPaa and 310 °C is expanded to 250 kPaa in accordance with the relation pv¹•²⁵ = C. Determine the work done.

A container filled with helium is dropped 3000 m above the ground, find the change of temperature?

A 3153-lb car is accelerated from 32 fps to 55 fps in 10 seconds. Determine the work done, in Btu.

A 2-kg steam at 2.5 MPaa and 260 °C undergoes a constant pressure until the quality becomes 70 %. Determine the heat rejected, in Btu. At 2.5 MPaa and 260°C: h = 2907.4 kJ/kg; and at 2.5 MPaa and 70 % quality: hr = 962.11 kJ/kg and h, = 2803.1 kJ/kg.

Helium is used in a Carnot engine where the volumes beginning with the constant temperature heat addition are V1 = 0.3565 m3, V2 = 0.5130 m3, V3 = 8.0 m3, and V. = 5.57 m3. Determine the thermal efficiency if k = 1.666.

A boiler installed where the atmospheric pressure is 752 mm Hg has a pressure of 12 kg/cm2. Find the absolute

A diesel cycle has a cut-off ratio of 2.5 and expansion ratio of 4 Find the clearance of the cycle.

A dual cycle has an initial temperature of 30°C. The compression ratio is 6 and the heat addition at constant volume process is 600 kJ/kg. If cut-off ratio is 2.5. find the maximum temperature of the cycle.

Determine the air-standard efficiency of an engine operating on the diesel cycle with clearance of 6% when the suction pressure is 99.97 kPa and the fuel is injected for 7% of the stroke. Assume k = 1.4.

A certain coal has the following ultimate analysis:C 69%N2 = 5%H2 = 2.5%S = 7% Determine the amount of oxygen if the heating value of fuel is 26,961.45 kJ/kg

A diesel engine consumed 645 liters of fuel per day at 35°C. If the fuel was purchased at 15.5°C and 30°API at P29.00/, determine the cost of fuel to operate the engine per day.

The dry exhaust gas from oil engine has the following gravimetric analysis: CO2 = 21.6% N2 = 74.2% O2 = 4.2% Specific heats at constant pressure for each component of the exhaust gas in Kcal/kg°C are CO2 Calculate the = 0.203, 02 = 0.219, N2 = 0.248 specific gravity if the molecular weight of air is 28.97 kg/kg-mol.

A bituminous coal has the following composition: C= 71.5% H= 5.0% O= 7.0% N = 1.3% S = 3% Ash = 7.6%W = 3.4% Determinebthe theoretical weight of Nitrogen in lb/lb of coal.

A gaseous fuel mixture has a molar analysis: H2 = 14% CH4 = 3% CO = 27% 02 = 0.6% CO2= 4.5% N2 = 50.9% Determine the air-fuel ratio for complete combustion on molar basis.

A volumetric analysis of a gas mixture is as follows: CO2 = 12%02 = 4%N2 = 82% CO = 4%What is the percentage of CO2 on a mass basis?

An air standard engine has a compression ratio of 18 and a cut-off ratio of 4. If the intake air pressure and temperature are 100 kPa and 27°C, find the work in kJ per kg.

A Diesel cycle has an initial temperature of 22 °C. If the cut-off ratio is 2.50 and compression ratio is 12, find the maximum cycle temperature.

An Otto cycle has an initial pressure of 100 kPa and has a pressure of 400 kPa after adiabatic compression. Find the cycle efficiency.

There are 18 kg of exhaust gas formed per kg of fuel oil burned in the combustion of diesoline CH. What is the excess air in percent?

The specific gravity of oil tested at 24°C is 0.852. Find its API in degrees.

An ideal gasoline engine operates with an initial cycle temperature of 48°C and exhaust temperature of 150°C. The change in temperature during combustion is 150°K. Calculate the ideal thermal efficiency.

A spark ignition engine operates on an Otto cycle with a compression ratio of 9 and temperature limits of 30°C and 1000°C. If the power input is 500 kW. Calculate the mass flow rate of air.

Consider a person standing in a breezy room at 20 deg C. Determine the total rate transfer from this person of the exposed surface area and the average outer surface temperature of the person are 1.6 m2 and 29 deg C,respectively, and the convection heat transfer coefficient is 6 W/m2 with emissivity of 0.95.

An aluminum pan whose thermal conductivity is 237 W/m-C has a flat bottom whose diameter is 20 cm and thickness0.4 cm. Heat is transferred to boiling water in the pan through its bottom at a rate of 500 watts. If the inner surface of the bottom of the pan is 105 deg C, determine the temperature of the surface of the bottom of the pan.

A frictionless piston-cylinder device and a rigid tank contain 1.2 kmol of a ideal gas at the same temperature, pressure, and volume. Now heat is transferred, and the temperature of both system is raised by 15 deg C. The amount of extra heat that must be supplied to the gas in the cylinder that is maintained at constant pressure.

A 4m x 5m x 6m room is to be heated by a baseboard resistance wear. It is desired that the resistance heater be able to raise the air temperature in the room from 7 to 23 deg c within 15 minutes. Assuming no heat losses form the room and an atmospheric pressure of 100 kpa, determine the required power of the resistance heater. Assume constant specific heats at room temperature.

A student living in a 4 m x 6m x 6m dormitory room turns on her 150 watts fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the doors and windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 10 hours later. Use specific heat value at room temperature, and assume the room to be at 100 kpa and 15 deg C in the morning when she leaves.