Which one of the following equations does not correctly represent the first law of thermodynamics for the given process

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Isothermal process : q=−w

Cyclic process : q=−w

Isochoric process : ΔE=q

Adiabatic process : ΔE=−w

answer is D.

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Detailed Solution

In adiabatic process. 110 heat is allowed to enter or leave the system, i.e. q = 0 Substituting this value in first law of thermodynamics.ΔE=q+W we get ΔE=WIn adiabatic expansion, work is done by the system on the surroundings hence W is negative. Accordingly , ∆E is also negative. i.e. internal energy decreases. In adiabatic compression. W is positive, ∆E is also positive

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