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The Molar heat capacities of nitrogen at...

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

94.32 J , 39.64 J

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The correct Answer is:
A
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