T-s diagram for isobaric ,isochoric, isothermal and adiabatic processes

 The T-S diagram for above mentioned process are given as under:

Isothermal process work in constant temperature i.e ∆t=0      [∆t=∆E]

Isobaric process work in constant pressure i.e. ∆p=0

Isochoric process box at constant volume i.e.  ∆v=0

Adiabatic process there is no exchange of heat i.e ∆h=0