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Question

The combustion of 5.0 g of coke raised the temperature of 1.0g of water from 10C to 55C. If specific heat of water of 1cal/ g, the calorific value of coke is ......

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Solution

The heat of combustion of 5 g of coke is 1.0g×1cal/g×(5510)0C=45cal
The calorific value of coke is 45cal5g=9cal/g

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