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Question

One mole of a monoatomic gas and one mole of a diatomic gas are mixed together. What is the molar specific heat at constant volume for the mixture ?

A
52R
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B
2R
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C
32R
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D
3R
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Solution

The correct option is B 2R
Given : One mole of a monoatomic gas and one mole of a diatomic gas are mixed together. What is the molar specific heat at constant volume for the mixture ?

Solution :
CVmix=n1CV1+n2CV2n1+n2

We have n1=n2=1mole , CV1=3R2 , CV2=5R2

Substituting these values in the formula we get

CVmix=3R2+5R22 = 2R

The Correct Option = B

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