Question

When 1 mole of an ideal gas is compressed to half its initial volume and simultaneously heated to twice its initial temperature the change in entropy is

Answer 1

If one mole of an ideal gas will be compressed to half of its initial volume and then heated to double its initial temperature , the Δ S will be :

Δ S = n Cv ln T2 / T1 + n R ln V2 / V1

Δ S = ( Cv - R ) ln 2