Which one of the following would raise the temperature of 20 g of water at 30°C most, when added to water? (Specific heat of copper = 0.1 cal/g C0)

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20 g of water at 40°C

80 g of water at 27°C

1000 g of copper at 25°C

4 g of water at 80°C

answer is D.

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Detailed Solution

Use principle of calorimetry to find final temperature in each case.

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