Understanding Phase Change: Effects of Heat on Kinetic Energy

• mopar969
In summary, a phase change is the process of a substance changing from one physical state to another, such as from a solid to a liquid or a gas. This change is caused by a change in temperature or pressure, which causes the molecules to rearrange themselves. There are three main types of phase changes: melting, freezing, and boiling. It is not possible for a substance to skip a phase change, as it must go through each one in order. Energy is also involved in a phase change, as it is needed to break or form bonds between molecules in order for the substance to change states.
mopar969
When a substance undergoes a phase change, the added heat changes (a) the temperature, (b) the kinetic energy, (c) the potential energy, (d) the mass of the substance.
I believe the answer is kinetic energy because the molecules move faster.

coz i guess both b,c

Only one answer is correct so I think the best answer is kinetic energy which is option B. What do you think, am I right?

i guess b is correct ... but c should also be an answer

Thanks.

you're welcome

1. What is a phase change?

A phase change is the process in which a substance changes from one physical state to another, such as from a solid to a liquid or a gas.

2. What causes a phase change?

A phase change is caused by a change in temperature or pressure. When a substance reaches a specific temperature or pressure, its molecules will rearrange themselves and change from one state to another.

3. What are the different types of phase changes?

The three main types of phase changes are melting, freezing, and boiling. Melting is the process of changing from a solid to a liquid, freezing is the process of changing from a liquid to a solid, and boiling is the process of changing from a liquid to a gas.

4. Can a substance skip a phase change?

No, a substance cannot skip a phase change. It must go through each phase change in order for it to change from one state to another. For example, water cannot go from a solid directly to a gas without first melting into a liquid.

5. How is energy involved in a phase change?

Energy is involved in a phase change because it is necessary to break or form bonds between molecules in order for the substance to change states. For example, energy is needed to break the bonds between molecules in a solid to change it into a liquid.

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