Advanced Science Primary 4 Energy

A metal block at 80°C is placed in a beaker containing 500ml of water at 30°C. What is the final temperature of the system when heat flow stops?

A Exactly 30°C
B Exactly 80°C
C Between 30°C and 80°C
D 110°C
Show Worked Solution

Worked Solution

Step 1: Heat flows from the hotter object (block) to the cooler one (water). Step [2-9]: The block loses heat (temp drops) and the water gains heat (temp rises). Step [2-9]: Equilibrium is reached at a point in between the two initial temperatures.

Correct answer: Between 30°C and 80°C

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