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Question

Question: Heat is supplied to a diatomic gas at constant pressure. The ratio of DQ : DU : DW is:...

Heat is supplied to a diatomic gas at constant pressure. The ratio of DQ : DU : DW is:

A

5 : 3 : 2

B

5 : 2 : 3

C

7 : 5 : 2

D

7 : 2 : 5

Answer

7 : 5 : 2

Explanation

Solution

Q=72nRΔTQ = \frac{7}{2}nR\Delta T , ΔU=52nRΔT\Delta U = \frac{5}{2}nR\Delta T

W=2nRΔT2W = \frac{2nR\Delta T}{2}