Write mathematical equations of first law of thermodynamics for the following processes:
(a) Adiabatic (b) Isochoric process

Explanation

(a) In adiabatic process, there is no exchange of heat thus q = 0. So, first law becomes `Delta U = W`.
(b) Isochoric process, as it carried in closed vessel `Delta V = 0` thus q = 0. So, first law becomes `Delta U = q`