question_answer

If h, p, T and v refer to enthalpy, pressure, temperature and specific volume respectively; and subscripts g and \[f\] refer to saturation conditions of vapour and liquid respectively, then Clausius-Clapeyron equation applied to change of phase from liquid to vapour states is:

A) \[\frac{dp}{dt}=\frac{({{h}_{g}}-{{h}_{f}})}{({{v}_{g}}-{{v}_{f}})}\]

B) \[\frac{dp}{dt}=\frac{({{h}_{g}}-{{h}_{f}})}{T\,({{v}_{g}}-{{v}_{f}})}\]

C) \[\frac{dp}{dt}=\frac{({{h}_{g}}-{{h}_{f}})}{T}\]        

D) \[\frac{dp}{dt}=\frac{({{v}_{g}}-{{v}_{f}})T}{({{h}_{g}}-{{h}_{f}})}\]