4. The boiling point for species A at 1 bar is reported to be 250 K, and you des

Question

4. The boiling point for species A at 1 bar is reported to be 250 K, and you desire to know the boiling point at 10 bar. Knowing the enthalpy of vaporization, you apply the Clausius-Clapeyron equation and calculate the temperature to be 300 K. However, at that pressure, you also know that species A is not an ideal gas, but rather attractive intermolecular interactions are significant. If you accounted for the attractive interactions, you would find that Species A boils (at less than 300 K, at 300 K, at greater than 300 K, or there is no way to determine). Explain your answer.

Explanation / Answer

By using Clausius - Clapeyron equation we get the equilibrium vapor pressure is 10 bar for the temperature of 300 K but at this temperature, as the gas is not ideal and attractive intermolecular interaction are significant. So after the accounting the intermolecular forces ( attractive) the new calculate temperature will be greater than 300 K as to overcome attractive forces of the molecule and to reach the vapor pressure of 10 bar you need to supply extra energy to the system.Which comes when you increase the temperature beyond 300 K.

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