Heat, mass, temperature change and specific heat

Answer Key - Grade 10 Science Worksheet - Building Confidence

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

1. 1.

   How much heat warms 250 g of water by 8 °C, using c = 4.18 J/(g·°C), Ari?

   8360 J
2. 2.

   How much heat warms 50 g of water by 30 °C, using c = 4.18 J/(g·°C), Bo?

   6270 J
3. 3.

   How much heat warms 200 g of water by 15 °C, using c = 4.18 J/(g·°C), Esme?

   12,540 J

4. Read this first

   Use this

   Specific heats at 25 °C (OpenStax Table 5.1, water rounded). Columns: substance, specific heat, J/(g·°C). water (liquid), 4.18; ice, 2.093; aluminum, 0.897; iron, 0.449; copper, 0.385; gold, 0.129.

5. 4.

   Using the table, equal masses get equal heat. Which warms the most, Kira?

   • Aluminum
   • Gold
   • Water
6. 5.

   Using the table, what does iron's 0.449 J/(g·°C) mean, Luz?

   • Iron melts at 0.449 °C
   • 0.449 J warms 1 g by 1 °C
   • 1 g of iron holds 0.449 J
7. 6.

   In q = m × c × ΔT, what is ΔT, Milo?

   • The temperature change
   • The final temperature
   • The time it takes
8. 7.

   In q = m × c × ΔT, what unit is q measured in, Noah?

   • Grams
   • Joules
   • Degrees
9. 8.

   An iron pan heats up much faster than the water in it. Why, Ren?

   • Iron has no specific heat
   • Iron's specific heat is lower
   • Water is lighter than iron
10. 9.

    Equal masses of aluminum and copper get equal heat. Which one's temperature rises more, Tala?

    • Copper
    • Aluminum
    • They rise the same
11. 10.

    1 g of water takes in 4.18 J. How much does it warm, Zee?

    • 4.18 °C
    • 1 °C
    • 0.418 °C