What happens to the volume of a gas when the temperature is increased?

Question

a
The volume stays the same
b
The volume is decreased
c
The volume is increased
Question 20
Which of the following will increase the rate at which a solute dissolves? (Select all that apply.)

a
increasing temperature
b
decreasing surface area
c
decreasing temperature
d
stirring
e
increasing surface area

Answer 1

For the first question:

When the temperature of a gas is increased, according to Charles's Law, the volume of the gas increases if the pressure remains constant. Therefore, the correct answer is:

c. The volume is increased.

For the second question regarding the factors that will increase the rate at which a solute dissolves, the following options apply:

• a. increasing temperature - This generally increases the solubility of solids in liquids and speeds up dissolving.
• d. stirring - This helps distribute the solute throughout the solvent, increasing the rate of dissolution.
• e. increasing surface area - Smaller particles or more surface area means more contact between the solute and solvent, increasing the rate of dissolving.

So the correct options are:

a, d, e.