Grade 10 · Science · Chemistry

10th grade Read a heating curve: what happens during melting and boiling worksheet

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Read a heating curve: what happens during melting and boiling

Grade 10 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

Melting ice takes 334 J/g. How much energy melts 10 g of ice at 0 °C, Ari?
Melting ice takes 334 J/g. How much energy melts 4 g of ice at 0 °C, Esme?
Read this first
Use this
Heating curve for 1 g of ice starting at -20 °C, at 1 atm, with a particle box under each part. A to B: ice warms from -20 °C to 0 °C, 41.8 J (packed particles vibrate faster). B to C: flat at 0 °C while the ice melts, 334 J (particles loosen). C to D: water warms from 0 °C to 100 °C, 418 J (particles slide faster). D to E: flat at 100 °C while the water boils, 2260 J (particles break free). E to F: steam warms.
3.
On the heating curve, what is happening on part B to C, Jun?
- The steam is warming
- The ice is melting
- The water is boiling
4.
On the heating curve, which part shows liquid water warming, Kira?
- D to E
- B to C
- C to D
5.
On the heating curve, what are the particles doing on part D to E, Luz?
- Packing into rows
- Breaking free of each other
- Vibrating faster in place
6.
Heat keeps flowing into melting ice. What happens to its temperature while it melts, Milo?
- It drops below 0 °C
- It stays at 0 °C
- It rises steadily
7.
A pot of water is boiling at 1 atm. What is its temperature while it boils, Pia?
- Rising past 120 °C
- 100 °C
- 50 °C
8.
What is the change from solid to liquid called, Ren?
- Melting
- Freezing
- Condensing
9.
What is the change from gas to liquid called, Tala?
- Evaporation
- Melting
- Condensation
10.
What is the change straight from solid to gas called, Zee?
- Condensation
- Sublimation
- Freezing

10th grade Read a heating curve: what happens during melting and boiling worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Read a heating curve: what happens during melting and boiling. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can read a heating curve: sloped parts warm a state; flat parts change state at a steady temperature.
I can find the energy to melt ice (334 J/g), boil water (2260 J/g) and warm ice or water (2.09 and 4.18 J/(g·°C)).
I can add the parts of a curve to find the energy from ice to steam.
I can read a simple phase diagram and name phase changes, including sublimation.

Standard: supports HS-PS3-2

Words to know

heating curve: A graph of temperature against energy added

heat of fusion: Energy to melt 1 g at its melting point: 334 J/g for ice

heat of vaporization: Energy to boil 1 g at its boiling point: 2260 J/g for water

sublimation: A change straight from solid to gas

phase diagram: A map of which state a substance is in at each temperature and pressure

Common mistakes

Your child used water's specific heat. Melting happens at one temperature, so use the heat of melting, 334 J/g.

Your child left out the mass. Q = m × c × ΔT, so more water needs more heat.

Your child left out melting and boiling. The flat parts of the curve take the most energy: 334 J/g and 2260 J/g.

Questions parents ask

What is the most common mistake with read a heating curve: what happens during melting and boiling?

Your child used water's specific heat. Melting happens at one temperature, so use the heat of melting, 334 J/g.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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