First slide

Questions based on phase change

Question

Calculate the amount of heat (in calories) required to convert 5 g of ice at 0°C to steam at 100°C:

Moderate

A

3100
B

3200
C

3600
D

4200

Solution

Required heat $= 5 \times 80 + 5 \times 1 \times (100 - 0) + 5 \times 540 = 3600 calorie .$

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