Question

Arrange the steps in order to describe what happens to a gas when it cools.

1.The particles of gas move slower.
2.The gas loses thermal energy.
3.The space between the gas particles decreases.
4.The gas changes to a liquid.
A. 1, 2, 3, 4
B. 2, 1, 3, 4
C. 3, 1, 2, 4
D. 4, 3, 2, 1

Answer 1

When a gas cools, it loses thermal energy which causes the particles to move slower, decrease in space between them, and eventually condense into a liquid, with the correct steps being B. 2, 1, 3, 4.

Step-by-step explanation:

When a gas cools, it undergoes a series of changes. Initially, the gas loses thermal energy, which causes the particles of gas to move slower. As a result of the decreased kinetic energy, the space between the gas particles decreases, allowing for the intermolecular attractive forces to become more significant. Eventually, the gas undergoes a phase change and changes to a liquid, a process known as condensation.

The correct order to describe what happens to a gas when it cools is therefore: the gas loses thermal energy, the particles of gas move slower, the space between the gas particles decreases, and finally, the gas changes to a liquid.

The sequence that represents this process is B. 2, 1, 3, 4.