First slide

Change in internal energy

Question

4 mole of a diatomic ideal gas are heated at constant pressure from 27°C to 327°C. Internal energy of the gas increases by: (take R = 2 cal/mol-K)

Easy

A

3000 calorie
B

6000 calorie
C

8400 calorie
D

10000 calorie

Solution

$∆ U = {nC}_{V} ∆ T = 4 (\frac{5}{2} R) (327 - 27) = 3000 R = 6000 cal$

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