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The heat liberated when 1.89 g of benzoi...

The heat liberated when 1.89 g of benzoic acid is burnt in a bomb calorimeter at `25^@C` increase the temperature of 18.94 kg of water by `0.632^@C`. If the specific heat of water at `25^@C` is 0.998 cal/g-deg, the value of the heat of combustion of benzoic acid is

A

881.1 cal

B

771.4 cal

C

981.1 cal

D

871.2 cal

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The correct Answer is:
B
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The heat liberated when 1.89g of benzoic acid is burnt in a bomob calorimeter at 25^(@)C and it increases the temperature of 18.94 kg of water by 0.632^(@)C . If the specific heat of water at 25^(@)C is 0.998cal*g^(-1)*""^(@)C^(-1) , the value of the heat of combustion of benzoic acid is-

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