Read calorimetry data: heat moves from hot to cold

Answer Key - Grade 10 Science Worksheet - Building Confidence

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

1. 1.

   Equal masses of water, one at 80 °C and one at 20 °C, are poured into one insulated cup. What temperature do they end at, Ari?

   50 °C
2. 2.

   Equal masses of water, one at 60 °C and one at 30 °C, are poured into one insulated cup. What temperature do they end at, Bo?

   45 °C
3. 3.

   Equal masses of water, one at 90 °C and one at 10 °C, are poured into one insulated cup. What temperature do they end at, Esme?

   50 °C
5. 4.

   Using the bars, which way does heat flow, Jun?

   • From the water to the copper
   • No heat moves between them
   • From the copper to the water
6. 5.

   Using the bars, what temperature does each sample end at, Kira?

   Use the picture in question 4.

   • Both end at 61.0 °C
   • Both end at 28.5 °C
   • Copper 100.0 °C, water 22.0 °C
7. 6.

   Using the bars, why do the temperatures stop changing, Luz?

   Use the picture in question 4.

   • The copper ran out of atoms
   • The water became copper
   • They now share one temperature
8. 7.

   In a calorimeter, heat lost by the hot part equals what, Noah?

   • Heat lost by the cold part
   • Heat gained by the cold part
   • Twice the heat the cold part gains
9. 8.

   Which way does heat flow on its own, Pia?

   • From small to big
   • From cold to hot
   • From hot to cold
10. 9.

    Why is a simple calorimeter made from a foam cup, Ren?

    • Foam speeds up reactions
    • Foam keeps heat from escaping
    • Foam makes heat of its own inside
11. 10.

    The water in a calorimeter warms while a reaction happens in it. What kind of reaction is it, Zee?

    • Endothermic
    • Exothermic
    • No reaction