Question

A given mass of a gas at 18°C and 740 mm of Mercury occupies a volume when the temperature is -10°C and the pressure is 740 mm of Mercury.

A) The volume decreases
B) The volume increases
C) The volume remains the same
D) The volume and pressure both decrease

Answer 1

The volume of the gas decreases when the temperature changes from 18°C to -10°C at a constant pressure.

Step-by-step explanation:

The question refers to the effects of temperature changes on the volume of a given mass of gas at constant pressure. According to Charles's Law, there is a direct relationship between the volume of an ideal gas and its temperature, provided that the pressure is kept constant. When a gas is cooled from 18°C to -10°C at a constant pressure of 740 mm of Mercury, the volume of the gas decreases. Hence, the correct answer to the provided question is A) The volume decreases.