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A vessel contains 5 mole of O2 . The system is given heat at constant pressure. As a result the gas expands and does 120 joule work. Heat given to the gas is:

a
310 J
b
390 J
c
420 J
d
560 J

detailed solution

Correct option is C

W=nR∆T=120, Q=nCP∆T=n72R∆T=72W=72×120=420 J.

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