Clapeyron–Clausius equation

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Clapeyron–Clausius equation Equation that relates the pressure and temperature at which a phase change occurs in a closed system. dP/dT = ΔHv/TΔV, where P is the pressure, T the absolute temperature, ΔHv the heat absorbed per mole during the phase change, and ΔV the change in molar volume.

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