Question

In all real life processes where heat transfer occurs ,the energy available for doing work? ​

Answer 1

Answer:

There are three ways in which heat transfer from one place to the other or from hot place to cold place. These are:

Conduction

Convection

Radiation

So first lets talk about conduction and its exampls.

Conduction is the tarnsfer of heat due to free electrons from hot to cold place in solids.

For example, if we put a a spoon in boiling water,as we know only the base of base of the spoon in is in direct contact with the pan.The handle of the spoon gets heated after some time due to conduction.

Convection is the tansfer of heat due to the actual movement of molecules from hot to cold place.(in fluids)

For eaxample,of you take your hands close over fire,your hands gets warm. Heat is tansformed from fire to your hands by actual movement of molecules. Here your hands are not in direct contact with fire. IT is convection.

Radiation is the transfer of heat in the form of waves called as elctromagnetic waves.

Answer 2

Answer:

Heat transfer is basically a process of movement of heat or energy from a high-temperature body to a low-temperature body. In other words, it would mean a motion of the heat across any point of the system or surroundings due to their temperature differences.

Explanation:

This can only travel from one place to another in several ways with their different modes including -

• Conduction - The transfer of energy from one particle of medium to another, while maintaining a direct contact b/w these two particles.
• Convection - The movement of fluid molecules from higher to lower temp. regions
• Radiation - Random motion of molecules in matter.