20 Physics -- Quantity of Heat

Other than phase change, are there conditions in which the temperature of a body remains constant regardless of the amount of heat supplied to it?

1 Answers

Yes, there are certain conditions under which the temperature of a body can remain constant regardless of the amount of heat supplied to it. These conditions occur when the body is in thermodynamic equilibrium with its surroundings.

In thermodynamic equilibrium, the body is in a state where it is no longer exchanging heat or matter with its surroundings. This means that the body is at a constant temperature and is not undergoing any changes in its internal energy.

If a body is in thermodynamic equilibrium with its surroundings and is supplied with heat, the heat will not cause the temperature of the body to increase. Instead, the heat will be absorbed by the body and used to increase its internal energy. The temperature of the body will remain constant until the body is no longer in thermodynamic equilibrium with its surroundings.

What is the specific heat capacity of water during boiling and melting?

At boiling point and melting point, there is no change in temperature. There is only phase change from solid to liquid during melting and liquid to gas during boiling. So at this time specific heat of water becomes infinite.

30gm of steam at 100°C is passed to 50gm of wax at 20°C. What will be the final result of mixing?(MP of wax=55°C, specific heat capacity of wax=2940J/KgK, Specific latent heat of fusion of wax=1.47...

Justify that there exist a triple point. Plz explain.

30gm of steam at 100°c is passed to 500gm of wax at 20°c .what will be final result?

What is specific latent heat of vaporization of a liquid?

The specific latent heat of vaporization of a liquid is the amount of heat energy that is required to vaporize (or turn into a gas) a certain mass of the liquid at a constant temperature. The specific latent heat of vaporization is usually expressed in units of energy per unit mass (e.g. joules per gram).

Example: Latent heat of vaporization of water is 540 cal/gm which means that 540 calorie of heat energy is required to change the water having mass 1 kg into vapour at constant temperature.

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