5 moles of hydrogen gas at constant volume changes it's temperature from 30 to 60 calculate the entropy change of hydrogen gas if cv =12.6JK-1mole-1

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5 moles of hydrogen gas at constant volume changes it's temperature from 30 to 60 calculate the entropy change of hydrogen gas if cv =12.6JK-1mole-1

Tejal mahajan 5th Feb, 2020

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Answer (1)

Shubham Dhane 6th Feb, 2020

Hello,

When temperature and volume is known then the change in entropy can be given by

S2-S1=M(cvln(T2/T1)-Rln(V2/V1))

ln(1)=0

Molecular weight of hydrogen=2.016

mass of hydrogen for 5 moles= molecular weight* number of moles

= 2.016*5

= 10.08

Therefore the change in entropy S2-S1= 10.08* 12.6*ln(60/30)

=88

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