Question

define critical temperature and critical pressure. in terms of the kinetic molecular theory, why is it impossible for a sub- stance to exist as a liquid above its critical temperature?

Answer 1

The critical temperature is the highest temperature at which a substance can exist as a liquid. Substances with strong intermolecular forces have high critical temperatures, while substances with weak intermolecular interactions have low critical temperatures.

Step-by-step explanation:

The critical temperature (Tc) is the highest temperature at which a substance can exist as a liquid. Above the critical temperature, the substance forms a single phase that completely occupies the volume of the container. The critical pressure (Pc) is the minimum pressure needed to liquefy a substance at the critical temperature.

Substances with strong intermolecular forces have high critical temperatures, while substances with weak intermolecular interactions have low critical temperatures.