Chemical Thermodynamics Question 40

Question: Equal volumes of monoatomic and diatomic gases at same initial temperature and pressure are mixed. The ratio of specific heats of the mixture (Cp/Cv) will be [AFMC 2002]

Options:

A) 1

B) 2

C) 1.67

D) 1.5

Show Answer

Answer:

Correct Answer: D

Solution:

Cv=32RT;Cp=52RT for monoatomic gas

Cv=52RT;,Cp=72RT for diatomic gas

Thus for mixture of 1 mole each, Cv=32RT+52RT2 and Cp=52RT+72RT2

Therefore, Cp/Cv=3RT2RT=1.5 .



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