Look at the equation for mercury (Hg), which is undergoing a phase change.

Question

Hg (s)
Hg (l)

What does this equation show?

Select all that apply.

Responses

Mercury is being heated.Mercury is being heated.

Liquid mercury is becoming a solid.Liquid mercury is becoming a solid.

Mercury is being cooled.Mercury is being cooled.

Solid mercury is becoming a liquid.

Answer 1

The equation you provided shows the phase change of mercury (Hg) from solid to liquid. Therefore, the correct response would be:

• Solid mercury is becoming a liquid.

The other statements do not apply to the equation:

• Mercury is being heated. (This is implied but not explicitly shown in the equation itself.)
• Liquid mercury is becoming a solid. (This is the opposite of what is shown.)
• Mercury is being cooled. (This is also implied but not explicitly shown in the equation itself.)

So, the only applicable response here is:

• Solid mercury is becoming a liquid.