Question

Show that the entropy change of the universe in a reversible
process is zero.​

Answer 1

here is yøur answer

If we take the water as our system, the entropy change of the system is reversible heat over temperature. Here the enthalpy at constant pressure process is the same with the heat. ... The entropy change of surrounding is thus +1.22 J/g.k. So the total entropy change of the universe is zero.