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A system of an ideal gas at T=27 degrees celsius expands isothermally doing 4000J of work...

A system of an ideal gas at T=27 degrees celsius expands isothermally doing 4000J of work in the process. What is the change in entropy of the gas?

a)148.1 J/degrees celsius

b)-148.1

c) 13.3

d)13.3

e)need more information

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