# Gibbs free energy spontaneity 2

Chemistry Level pending

Ethanol’s enthalpy of vaporization is $$38.7$$ kJ mol$$^{-1}$$ at its normal boiling point $$78$$ °C. Calculate $$Δ G$$ when $$2.00$$ mol ethanol is vaporized reversibly at $$78.0$$ °C and $$1.0$$ atm.

Assume that the vapor is an ideal gas, and the volume of the liquid ethanol relative to the volume of its vapor is negligibly small.

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