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

   50 °C
4. 3.

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

   • From the copper to the water
   • From the water to the copper
   • No heat moves between them
5. 4.

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

   Use the picture in question 3.

   • The copper ran out of atoms
   • The water became copper
   • They now share one temperature
6. 5.

   A hot spoon is placed in cool water. What happens, Milo?

   • The spoon cools and the water warms
   • Both get hotter
   • The spoon warms and the water cools
7. 6.

   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
8. 7.

   Which way does heat flow on its own, Pia?

   • From hot to cold
   • From cold to hot
   • From small to big
9. 8.

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

   • Foam keeps heat from escaping
   • Foam makes heat of its own inside
   • Foam speeds up reactions
10. 9.

    Why is the water's temperature change recorded in calorimetry, Tala?

    • It gives the water's mass
    • It gives the heat gained or lost
    • It shows the reaction's color
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