Caluculate Change in internal energy when 5 moles of hydrogen is heated to `20^(@)C` from , Specific heat of hydrogen at constant pressure is 8 cal `("mol"^(@)C)^(-1)`
A. 200 cal
B. 350 cal
C. 300 cal
D. 450 cal

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1 Answers

Correct Answer - C
Given , `C_(p)=8 "cal"("mol"^(@)C)^(-1)`
`C_(v)=C_(p)-R=8-2=6" cal "("mol"^(@)C)`
`therefore"internal energy du"=mC_(v)(T_(2)-T_(1))=5xx6(20-10)`
`300"cal" `

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