Question

One mole of a perfect gas at 300K has an initial pressure at 15 atm and is allowed to contract isothermally to a pressure of 1 atm. Calculate the entropy change from this contraction

Answer 1

Initial pressure=15atm,final pressure=1atm

Temperature=300k

Now 1Latm= 103joules

∆d_system=∆d_surrounding

=-(dv)/T

={-(15-1)/300}×103

=-4.80J.