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lec 3

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20問 • 1年前

問題一覧

1

1

2

The Molar heat capacities of nitrogen at constant pressure and constant volume are 29.11kJ/k mole K and 20.81 kJ/kmole K, respectively. When 5 gram of nitrogen is heated from 290 to 310 K (i) the decrease in its internal energy and (ii) the external work done are, (Molecular weight of nitrogen = 28) A) 74.32 J, 29.64 J B) 29.64 J, 74.32 J C )64.32 J, 19. 64 J D)94.32J, 39.64 J

1

3

If 110 J of heat are added to a gaseous system, whose internal energy is increases by 40 J, then the amount of work done is

70J

4

1

5

2.0PV

6

1

7

3

8

Consider the following two statements and choose the correct answer. (I) If heat is added to a system, its temperature must always increase. (II) If positive work is done by a system in thermodynamic process, its volume must increase

II

9

4

10

3

11

3

12

3

13

Find ratio of internal energy of dia-atomic and monoatomic gas both at temperature T, for translational d.o.f.

1:1

14

Find ratio of internal energy per d.o.f of dia-atomic and monoatomic gas both at temperature T

1:1

15

A polyatomic gas with n degrees of freedom has a mean energy per molecule given by

nKT/2

16

2

17

1

18

For hydrogen gas Cp - Cv= a and for oxygen gas Cp - Cv = b, so the relation between a and b is given by [1991] 1 )a = 16b 2) 16b = a 3) a = 4b 4)a = b

4

19

First law of thermodynamics is the consequence of conservation of

energy

20

2

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問題一覧

1

1

2

The Molar heat capacities of nitrogen at constant pressure and constant volume are 29.11kJ/k mole K and 20.81 kJ/kmole K, respectively. When 5 gram of nitrogen is heated from 290 to 310 K (i) the decrease in its internal energy and (ii) the external work done are, (Molecular weight of nitrogen = 28) A) 74.32 J, 29.64 J B) 29.64 J, 74.32 J C )64.32 J, 19. 64 J D)94.32J, 39.64 J

1

3

If 110 J of heat are added to a gaseous system, whose internal energy is increases by 40 J, then the amount of work done is

70J

4

1

5

2.0PV

6

1

7

3

8

Consider the following two statements and choose the correct answer. (I) If heat is added to a system, its temperature must always increase. (II) If positive work is done by a system in thermodynamic process, its volume must increase

II

9

4

10

3

11

3

12

3

13

Find ratio of internal energy of dia-atomic and monoatomic gas both at temperature T, for translational d.o.f.

1:1

14

Find ratio of internal energy per d.o.f of dia-atomic and monoatomic gas both at temperature T

1:1

15

A polyatomic gas with n degrees of freedom has a mean energy per molecule given by

nKT/2

16

2

17

1

18

For hydrogen gas Cp - Cv= a and for oxygen gas Cp - Cv = b, so the relation between a and b is given by [1991] 1 )a = 16b 2) 16b = a 3) a = 4b 4)a = b

4

19

First law of thermodynamics is the consequence of conservation of

energy

20

2