1)During a certain thermodynamics process, 800 J of heat is transferred to the s

Question

1)During a certain thermodynamics process, 800 J of heat is transferred to the system and 418 J of work is done on the system. The change in internal energyduring this process is:

a)1218 J

b)318 J

c) 800 J

d) 418 J

2

Choose the statement(s) that is/are true of the molar heat capacity of a monatomic gas.

(i) The molar heat capacity at constant pressure (Cmp) is the same as the molar heat capacity at constant volume (Cmv ).

3

?A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80oC and the other end is kept at 0oC. The surface of the bar is insulated so that there is negligible heat loss through it. If kcopper = 401 W.m-1.K-1, what is the thermal resistance of the bar?

(i)   ?3.79 K.W-1

(ii) ?3.22 K.W-1

(iii)   ?4.96 K.W-1

(iv) 1.98 K.W-1

4)

If the volume and pressure of an ideal gas are both reduced to half their original value, the absolute temperature of the gas is:

5)

?If the absolute temperature of a gas is doubled, what is the change in the average kinetic energy of its molecules?

(i)   increases by a factor of 2?

(iii) increased by a factor of 4

Explanation / Answer

true answer is 1)C 2)A 3)D 4)D 5)B

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