Question

When is the boiling point of a liquid equal to its normal boiling point? Select one:

a. The boiling point of liquid is equal to its normal boiling point when the atmospheric pressure is equal to 10 atm (or 7600 mmHg).

b. The boiling point of liquid is equal to its normal boiling point when you are at the top of the highest mountain in the state of Colorado.

c. The boiling point of liquid is equal to its normal boiling point when the atmospheric pressure is equal to 1 atm (or 760 mmHg).

d. The boiling point of liquid is equal to its normal boiling point when the volume of the liquid is equal to 1000 mL (or 1 L).

e. The boiling point of liquid is equal to its normal boiling point when the temperature is equal to 25oC (or 298 K).

Answer 1

(C) The boiling point of a liquid is equal to its normal boiling point when the atmospheric pressure is equal to 1 atm (760 mmHg). The normal boiling point is defined based on this standard pressure condition.

Step-by-step explanation:

The boiling point of a liquid is equal to its normal boiling point under specific atmospheric conditions. When the external atmospheric pressure surrounding a liquid equals 1 atm (or 760 mmHg or 101.3 kPa), the liquid will boil at its normal boiling point. In essence, the normal boiling point is the temperature at which the liquid's vapor pressure equals 1 atm.

The correct answer to the given question is (c) The boiling point of liquid is equal to its normal boiling point when the atmospheric pressure is equal to 1 atm (or 760 mmHg). This is because the normal boiling point is defined based on standard atmospheric pressure, which is 1 atm.