Read a heating curve: what happens during melting and boiling
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
Water's specific heat is 4.18 J/(g·°C). How much energy warms 50 g of water from 20 °C to 80 °C, Ari?
Water's specific heat is 4.18 J/(g·°C). How much energy warms 20 g of water from 0 °C to 50 °C, Esme?
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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.
On the heating curve, which part takes the most energy, Jun?
- D to E, boiling
- B to C, melting
- C to D, warming
On the heating curve, why does C to D take 418 J, Kira?
- 1 × 2.09 × 100 = 418
- 1 × 334 + 100 = 418
- 1 × 4.18 × 100 = 418
On the heating curve, why does A to B take 41.8 J, Luz?
- 1 × 2.09 × 20 = 41.8
- 334 ÷ 10 = 41.8
- 1 × 4.18 × 20 = 41.8
On the phase diagram, which state is in the cold region at the left, Milo?
- Liquid
- Gas
- Solid
On the phase diagram, what is true at a point on the line between solid and liquid, Noah?
Use the picture in question 6.
- No matter exists
- Solid and liquid exist together
- Just the gas exists at that point
Water at 0 °C freezes. What happens to energy, Ren?
- No energy moves
- Energy is given out
- Energy is taken in from the air
Water cools from 20 °C into ice. Where is the cooling curve flat, Tala?
- At 20 °C, at the start
- At 10 °C, halfway
- At 0 °C, while it freezes
Steam condenses to water at 100 °C. How much energy does 1 g give out, Zee?
- 334 J
- 4.18 J
- 2260 J