• question_answer Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume non-expansion work is zero) A) Adiabatic process : $\Delta U=-\,W$ B) Cyclic process : $q=-\,W$ C) Isothermal process : $q=-W$ D) Isochoric process : $\Delta U=q$

 1st law of thermodynamics $\Delta E=q+w$ 1. Adiabatic process $q=0,(\Delta E=w)or\,(\Delta U=w)$ 2. Cyclic process $\Delta E=0,(q=-w)$ 3. Isothermal process $\Delta E=n{{C}_{V}}\Delta T.(\Delta T=0)$ $\Delta E=0,(q=-w)$ 4. Isochoric process $\Delta V=0$ $W=P\Delta V=0$ $\Delta E=q.$