First slide

Calorimetry

Question

How much work can be obtained from 100 calories of heat energy?

Moderate

A

100 J
B

420 J
C

42 J
D

4200 J

Solution

1 calorie = 4.2J
$∴$ Work done = heat obtained in calories $\times$ 4.2J
or W = 100 $\times$ 4.2 = 420 J

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