When a solid is placed in a container and heat is applied, a phase change occurs. Watch the video and identify which of the following statements are correct. Check all that apply. View Available Hint(s) Check all that apply. The temperature increases while all of a liquid is converted to a gas. The average kinetic energy of the system changes while all of a solid is converted to a liquid. Temperature remains constant while all of a solid is converted to a liquid. When heat is applied to a solid, the molecular motion decreases as the temperature increases. When a solid is converted to a liquid, heat is absorbed.

Phase change is said to occur when a substance from one state of matter changes to another state. Phase change occurs at a fixed temperature. For example, water boils and converts to steam at 100°C. During the phase change, the average kinetic energy of the system remains constant which is indicated by constant temperature. Actually, the molecular motion does increase with increase in heat but heat is absorbed in breaking the bonds and formation of new bonds.

Thus, third and last statement are correct.

throwdolbeau throwdolbeau · Answer 2 · 2022-02-01T13:23:49+01:00

From the given statement: "When a solid is placed in a container and heat is applied, a phase change occurs:

The correct options are:

3. When heat is applied to a solid, the molecular motion decreases as the temperature increases

4. When a solid is converted to a liquid, heat is absorbed.

What is a Phase Change?

A phase change is when matter changes to from one state (solid, liquid, gas, plasma) to another.
These changes occur when sufficient energy is supplied to the system (or a sufficient amount is lost), and also occur when the pressure on the system is changed.

During the phase change, the average kinetic energy of the system remains constant which is indicated by constant temperature.
Actually, the molecular motion does increase with increase in heat but heat is absorbed in breaking the bonds and formation of new bonds.

Therefore, options 3 and 4 are correct.

Find more information about Phase change here:

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