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Increasing the total pressure above a liquid raises the boiling point. Which of the following best explains why?

P.S I put B the first time and it was wrong


The number of molecules with high kinetic energies is increased.


The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is decreased.


The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised.


The number of molecules with high kinetic energies is reduced.

Verified Answer :

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C.) The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised.

Answer: Option (c) is the correct answer.

Explanation:

When vapour pressure of a liquid becomes equal to the atmospheric pressure then temperature at this point is known as boiling point.

When atmospheric pressure is increased then we also have to increase the vapour pressure of liquid, that is, we have to provide more heat to the liquid.

Thus, we can say that we have to increase the temperature and as a result, there will be increase in kinetic energy of molecules.

Thus, we can conclude that the statement, amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised best explains why increasing the total pressure above a liquid raises the boiling point.

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