When the kinetic energy of molecules decreases, which phase change occurs?(1 point)

Question

Responses

Sublimation
Sublimation

Condensation
Condensation

Melting
Melting

Boiling

The diagram below shows molecules in a state of matter:

If enough thermal energy is removed from the container to cause a change in state, which statement best describes what will happen?

(1 point)
Responses

Molecular energy will decrease, and the substance will change from a gas to a liquid.
Molecular energy will decrease, and the substance will change from a gas to a liquid.

Molecular energy will increase, and the substance will change from a liquid to a gas.
Molecular energy will increase, and the substance will change from a liquid to a gas.

Molecular energy will decrease, and the substance will change from a liquid to a gas.
Molecular energy will decrease, and the substance will change from a liquid to a gas.

Molecular energy will increase, and the substance will change from a gas to a liquid.

This graph shows the phase change for water.



Which statement best describes what is happening at portion C?

(1 point)
Responses

Both Energy and temperature remain the same.
Both Energy and temperature remain the same.

The energy is increasing, and temperature is also increasing.
The energy is increasing, and temperature is also increasing.

The temperature is increasing, but the energy stays the same.
The temperature is increasing, but the energy stays the same.

The energy is increasing, but the temperature stays the same.

Answer 1

1. When the kinetic energy of molecules decreases, the phase change that occurs is Condensation. This is because condensation is the transition from a gas to a liquid, which occurs when the kinetic energy of the molecules decreases, allowing them to come closer together and form a liquid.

2. If enough thermal energy is removed from the container to cause a change in state, the statement that best describes what will happen is: Molecular energy will decrease, and the substance will change from a gas to a liquid. This occurs when thermal energy is removed, resulting in a loss of kinetic energy and a phase change from gas (vapor) to liquid.

3. At portion C on the phase change graph for water, the statement that best describes what is happening is: The energy is increasing, but the temperature stays the same. This situation typically occurs during a phase change, such as when ice is melting to water, where energy is added (in the form of heat) but the temperature does not increase until the phase change is complete.