100 g of a copper body take at `60^(@)C` is cooled to `40^(@)C.` How much heat does it release ?

Water is cooled from 4^@C and 0^@C . How can it change?

70 cal of heat is required to increase the temperature of 2 mol of an ideal diatomic gas at constant pressure from 40^(@)C to 45^(@)C . How much heat will be required to increase the temperature of that gas by the same amount at constant volume? R = 2 cal cdot mol^(-1) cdot K^(-1) .

To rise temperature of 30 gm water from 20^@C to 50^@C how much heat is required?

What is the amount of work done to convert 40 g of ice at -10^(@)C into steam at 100^(@)C ? Specific heat of ice = 0.5 cal cdot g^(-1) cdot ^(@)C^(-1) , latent heat of fusion of ice =80 cal cdot g^(-1) , latent heat of steam = 540 cal cdot g^(-1), J = 4.2 xx 10^(7) erg cdot cal^(-1) .

A vessel made of copper weighs 1 kg and it contains 1 kg of water at 10^(@)C . How much coal will be required to raise the temperature of this water to 100^(@)C ? On burning 1 kg of coal, 10^(4) cal of heat can be produced and 40% of this heat is lost. Specific heat of copper ="0.09 cal.g"^(-1).^(@)C^(-1) .

An iron saucepan contains 100 g of water at 25^(@)C . When 50 g of water at 60^(@)C is mixed with it, the final temperature of the mixture becomes 35^(@)C . If no heat is lost due to radiation or other means, then what is the water equivalent of the saucepan? If hte mass of this saucepan is 238 g, then what is the specific heat of iron?

A calorimeter holds 200 g of water at 10^(@)C . When 50 g of water at 100^(@)C is added to it, the temperature of the mixture becomes 27^(@)C . A metal ball of mass 100 g at 10^(@)C is now added to water, and the final temperature reaches 26^(@)C . Find the specific heat of the metal.

Mass of an object is 200 gm and specific heat 0.09 calorie/gm C . To rise temperature of that object from 20^@C to 90^@C how much heat is required?

The resistance of a copper wire at 20^@C is 3 Omega and at 100^@ is 3.94 Omega .Determine the temperature coefficient of resistance of copper.