Chemistry, asked by akhileshkumard38, 1 year ago

calculate enthalpy change (in kcal) in adiabatic compression of 5 moles of ideal triatomic non linear gas against a constant external pressure of 2atm starting from initial pressure of 1 atm and initial temperature 300k.Given: R= 2cal/mol.K.

Answers

Answered by siddharth19402

work done =∆U

∆U=fnRT/2

=>375 L-atm

∆H=∆U+ ∆PV

∆H=375+(2V2-62.5)

375=5*3*(T-300)

T2=325

v2=78.125L

∆H=468.75L-atn

akhileshkumard38: ∆U=fnRT/2

akhileshkumard38: How

akhileshkumard38: ∆U=nCv∆T

akhileshkumard38: And how ∆H=375+(2V2-62.5)

siddharth19402: keep Cv=(f/2)R

siddharth19402: sorry keep∆H=∆U*Y

siddharth19402: Y=gamma=4/3

siddharth19402: the answer is 500

siddharth19402: i used ∆H=∆U +∆PV

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