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Chapter 11: Problem 67

As a liquid is heated at constant pressure, its temperature rises. This trend continues until the boiling point of the liquid is reached. No further rise in temperature of the liquid can be induced by heating. Explain.

Short Answer

Expert verified
Upon reaching its boiling point, additional heating does not increase the temperature of the liquid, but rather is used in breaking the intermolecular forces, thereby converting the liquid into gas, through the process of latent heat of vaporization.

Step by step solution

01

Understand Heat Transfer

Heat transfer occurs when there is a temperature difference between two substances. When a liquid is heated, the heat energy is transferred to the liquid increasing its kinetic energy and hence its temperature.
02

Understand the Concept of Boiling Point

The boiling point is the temperature at which the vapour pressure of the liquid becomes equal to the external pressure, and the liquid becomes capable of becoming a gas. Therefore, upon reaching the boiling point, a liquid starts to boil or change its state from liquid to gas.
03

Reason for No Further Rise in Temperature

Once the boiling point is reached, the temperature no longer increases despite additional heating. This is because any additional heat supplied does not increase the liquid's kinetic energy and thus its temperature but rather is used in breaking the intermolecular bonds to change the state from liquid to gas, a process generally known as latent heat of vaporization.

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