Question

What do these two changes have in common?

1) Both involve a change in state
2) Both are caused by heat
3) Both occur naturally
4) Both can be reversed

Answer 1

The two changes both involve a change in state, are driven by heat, occur naturally, and are reversible processes such as the melting and freezing of water or the condensation and evaporation of water vapor.

Step-by-step explanation:

The two changes described in the question share several commonalities:

• Both involve a change in state of a substance.
• Both are caused and driven by the transfer of heat.
• Both occur naturally in the environment.
• And both changes are reversible, meaning the process can be reversed, returning the substance to its original state.

For example, when ice melts to form water, it involves a change in state from solid to liquid, the process is caused by the addition of heat, it occurs naturally, and it can be reversed by freezing the water back into ice. Conversely, when water vapor condenses to form liquid water, this process is also reversible, occurs naturally, is driven by heat removal (cooling), and results in a change in state from gas to liquid.