A Perpetual Motion Machine of First Kind

Thermodynamics originated as result of man's endeavour to convert the disorganized form of energy (internal energy) into organized form of energy (work).

(6.11)

An imaginary device which would produce work continuously without absorbing any energy from its surroundings is called a Perpetual Motion Machine of the First kind, (PMMFK). A PMMFK is a device which violates the first law of thermodynamics. It is impossible to device a PMMFK (Figure 6.3)

Figure 6.3

The converse of the above statement is also true, i.e., there can be no machine which would continuously consume work without some other form of energy appearing simultaneously.