Practically heat and work are completely interchangeable forms of energy.

Practically heat and work are completely interchangeable forms of energy

a. True
b. False

Correct Answer : b. False

Explanation :

According to the first law of thermodynamics, the energies are converted from one form to another form. For example, according to Joule, based on his experiments, energy supplied to a system in a form of heat, can be completely converted into work. But this process is not possible, because we know that in thermodynamic process internal energy of a system also increases. Thus,
Heat transfer – Internal energy increase – Work transfer
The complete conversion of heat into work is not possible. Therefore heat and work are not not completely interchangeable forms of energy.