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Q.

A diatomic gas is kept in a closed container of constant volume. Due to increase in temperature some molecules dissociates into atoms. Neglecting vibrational degrees of freedom:-

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a

Specific heat capacity of mixture can change by a maximum value of 8%

b

Specific heat capacity of mixture will increase.

c

Specific heat capacity of mixture can change by a maximum value of 20%

d

Specific heat capacity of mixture will decrease

answer is A, D.

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Detailed Solution

2(CV)monoatomic>(CV)diatomic

Maximum change  =(2)(3R2)(1)(5R2)5R2=15
% change = 20%
 

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A diatomic gas is kept in a closed container of constant volume. Due to increase in temperature some molecules dissociates into atoms. Neglecting vibrational degrees of freedom:-