When 10 g of coal is burnt, it raises the temperature of 2 litres of water from `20^(@)C` to `55^(@)C`. Calculate the heat of combustion of fuel.

If 0.5 kg of coal on burning raises the temperature of 50 L of water from 20^(@)C to 90^(@)C, then the heat of combustion of coal is nxx10^(6)" cal . Kg"^(-1) . Find the value of n.

10 Calories of heat would raise the temperature of 2 g of water by

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.

The quantity of heat required to raise the temperature of 2000 g of water from 10^@C to 50^@C is

How much heat energy is necessary to raise the temperature of 5 kg of water from 20^@C to 100^@C

An energy of 84000 J is required to raise the temperature of 2 kg of water from 60^@ C " to " 70^@ C . Calculate the specific heat capacity of water.