The heat energy produced by the complete combustion of 25 g of a fuel is supplied to 500 g of water to increase the value of temperature from `35^@C` to `55^@C`. Find the calorific value of the fuel. (Specific heat capacity of water = 1 cal `g^(-1)""^(@)C^(-1)`)

The heat produced on complete combustion of 20 g of a fuel could raise the temperature of 1.5 kg of water form 25^(@)C to 75^(@)C . Calculate the calorific value of the fuel if the specific heat capacity of water is 4.2 J g^(-1).^(@)C^(-1) . Assume that the heat absorbed by the container is negligible.

Specific heat capacity is expressed in cal // g .^(@) C

Calculate the amount of heat energy required to increase the temperature of 250 g of water from 27^(@)C to 67^(@)C (Specific heat capacity of water is 1 cal g^(-1@)C^(-1) )

10 g of water at 70^@C is mixed with 5 g of water at 30^@C . Find the temperature of the mixture in equilibrium. Specific heat of water is 1 cal//g-^@C .