Question
Sat November 17, 2012 By:
 

An ideal gas expand against a constant external pressure at 2.0 atmosphere from 20 litre to 40 litre and absorb 10kJ of energy from surrounding.What is the change in internal energy of the system?(1 atm-litre = 101.3J)

Expert Reply
Wed November 21, 2012

dH = dE +dnRT

10 =dE + P.dV

10 = dE + 2x 20

dE= 10-40

dE=-30KJ
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