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)

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For cyclic process: Δ U = 0 ⇒ q = - w For isothermal process: Δ U = 0 ⇒ q = - w For adiabatic process: q = 0 ⇒ Δ U = w For isochoric process: w = 0 ⇒ Δ U = q

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