Heat, mass, temperature change and specific heat

Answer Key - Grade 10 Science Worksheet - Challenge Me

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

1. 1.

   The sample has mass 348 g, absorbs 6640 J and warms by 21.2 °C. What is its specific heat, Ari?

   0.9 J/(g·°C)
2. 2.

   The sample has mass 808 g, absorbs 18140 J and warms by 50 °C. What is its specific heat, Bo?

   0.449 J/(g·°C)

3. 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.

4. 3.

   Using the table, a metal's specific heat is measured as 0.900 J/(g·°C). Which metal is it most likely, Jun?

   • Aluminum
   • Copper
   • Iron
5. 4.

   Using the table, a metal's specific heat is measured as 0.38 J/(g·°C). Which metal is it most likely, Kira?

   • Aluminum
   • Copper
   • Gold
6. 5.

   Using the table, a metal's specific heat is measured as 0.45 J/(g·°C). Which metal is it most likely, Luz?

   • Iron
   • Gold
   • Copper
7. 6.

   Noah says warming 200 g of water by 10 °C takes the same heat as 100 g by 10 °C. Agree or disagree?

   • Agree: the same ΔT means the same heat
   • Agree: water's c is the same
   • Disagree: twice the mass, twice the heat
8. 7.

   Pia says a substance with a high specific heat warms up quickly. Agree or disagree?

   • Agree: high c lets heat in faster
   • Agree: water warms faster than metals
   • Disagree: it warms slowly
9. 8.

   How much heat warms 100 g of water from 20 °C to 100 °C, Ren?

   • 41,800 J
   • 8,360 J
   • 33,440 J
10. 9.

    6,270 J warms 50 g of water. By how much does its temperature rise, Tala?

    • 125 °C
    • 0.03 °C
    • 30 °C
11. 10.

    Which needs more heat to warm by 10 °C: 100 g of water or 500 g of iron, Zee?

    • The 100 g of water
    • They need the same
    • The 500 g of iron