The combustion of 5.0 g of coke raised the temperature of 1.0g of water from 10∘C to 55∘C. 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×(55−10)0C=45cal The calorific value of coke is 45cal5g=9cal/g