An increase in the temperature of a contained liquid a. has no effect on the kinetic energy of the liquid b. causes the vapor pressure above the liquid to decrease c. causes fewer particles to escape from the surface of the liquid d.

Causes the vapor pressure above the liquid to increase

Explanation:

When a liquid is contained and the liquid's temperature is increased, the molecules of the liquid vibrates more and more energetic molecules escape from the force holding the molecules together; they gain more kinetic energy and leave the surface of the liquid thereby increasing the vapor pressure since the molecules are contained. The pressure exerted on the containing vessel increases as a result of the increase in the number of molecules colliding with the wall.

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the product of the pressure and volume is also constant