A great deal of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/or a hypothetical machine that produces more work or energy than it consumes. Explain, in terms of heat engines and the first law of thermodynamics, why or why not such a machine is likely to be constructed.

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According to the first law of thermodynamics,  △      E          int        =  Q  −  WWe know that a work is done by the system when W&amp;gt;0 and a work is done on a system when W&amp;lt;0.Now, a machine that performs a work forever reflects a machine with infinite internal energy. Since, it is not possible for a machine to have infinite internal energy, a machine that works for ever is not possible.

A great deal of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/or a hypothetical machine that produces more work or energy than it consumes.

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