Math

QuestionDuring which phase change does a substance release heat?
1. Melting
2. Sublimation
3. Condensation
4. Vaporization

Studdy Solution

STEP 1

What is this asking? Which of these changes of state *releases* heat energy, instead of taking it in? Watch out! Don't mix up which changes need heat added and which ones give heat off!

STEP 2

1. Melting
2. Sublimation
3. Condensation
4. Vaporization

STEP 3

Melting is when a **solid** turns into a **liquid**.
Think of ice melting into water.
For this to happen, you need to *add* heat, so melting is not the answer!

STEP 4

Sublimation is when a **solid** turns directly into a **gas**, skipping the liquid stage altogether!
Think of dry ice, which is solid carbon dioxide, turning directly into a gas.
This also needs heat *added*, so it's not our answer either.

STEP 5

Condensation is when a **gas** turns into a **liquid**.
Think of water vapor in the air turning into liquid water droplets on a cold glass.
For this to happen, heat needs to be *released*!
This sounds like our winner!

STEP 6

Vaporization (or boiling) is when a **liquid** turns into a **gas**.
Think of a pot of water on the stove turning into steam.
This requires adding heat, so it's not what we're looking for.

STEP 7

The phase change that releases heat is **condensation**!

Was this helpful?

Studdy solves anything!

banner

Start learning now

Download Studdy AI Tutor now. Learn with ease and get all help you need to be successful at school.

ParentsInfluencer programContactPolicyTerms
TwitterInstagramFacebookTikTokDiscord