Reference Table H

Front

What phenomenon occurs in a closed container where particles continuously transition between vapor and liquid phases?

Back

Evaporation

Front

What is the definition of boiling point?

Back

The temperature at which vapor pressure equals external pressure on a fluid.

Front

Why does water not boil at 70ºC at sea level?

Back

Because the vapor pressure is less than atmospheric pressure.

Front

What is the vapor pressure of propanone at 50ºC?

Back

83 kPa.

Front

What is the normal boiling point of water?

Back

100ºC.

Front

What is the relationship between vapor pressure and temperature?

Back

As temperature increases, vapor pressure also increases.

Front

What happens to the boiling point of a liquid at higher altitudes?

Back

The boiling point decreases due to lower atmospheric pressure.

Front

What is the significance of vapor pressure in determining boiling point?

Back

Vapor pressure must equal external pressure for a liquid to boil.

Front

How does the presence of solutes affect the boiling point of a solution?

Back

The boiling point increases, a phenomenon known as boiling point elevation.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at any temperature, while boiling occurs at a specific boiling point.