Which thermodynamic parameter is not a state function? (a) q at constant pressure (b) q at constant volume (c) W at adiabatic (d) W at isothermal?

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Which thermodynamic parameter is not a state function? (a) q at constant pressure (b) q at constant volume (c) W at adiabatic (d) W at isothermal?

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Which thermodynamic parameter is not a state function? (a) q at consta...

Option is D: W at isothermalH and U are state functions but W and q are not state functions. From the equation, Δll = ΔU + ΔPV At constant pressure, ΔH = ΔU + P ΔV At constant volume, ΔH = ΔU + V ΔP At constant pressure, ΔP = U, ΔH = qpSo, it is a state function. At constant volume, ΔV = 0, ΔU = qv, So, it is a state function. Work done in any adiabatic process is state function. ΔU = q - W (because q = 0) ΔU = -W Work done in isothermal process is not a state function. W = -q (because ΔT = 0, q not equal to 0)

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