Interpretation:
This has to be using the thermodynamic data, ethanol vapor pressure value has to be calculated at
Concept Introduction:
Vapour pressure: Vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in closed system. Vapour pressure is nothing but the tendency of particles to escape from the liquid (or) solid.
In
The equation given below helps us to calculate the change in free energy in a system.
At a temperature of normal boiling point, the gaseous state of the system will be in equilibrium with the liquid state. The free energy change in the system will be zero. Taking the free energy value as zero, molar entropy of vaporization can be calculated using the following equation.
Where,
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