CONCEPT:According to first law of THERMODYNAMICS:δQ = δW + ΔUAdiabatic PROCESS (δQ = 0): δW = - ΔUIsothermal Process (ΔT = 0 ⇒ ΔU = 0): δQ = δWIsochoric Process (ΔV = 0 ⇒ ΔW = 0): δQ = ΔUIsobaric Process (ΔP = 0): δQ = δW + ΔU