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  • Consider a cycle followed by an engine 1 to 2 is isothermal

Consider a cycle followed by an engine

1 to 2 is isothermal

2 to 3 is adiabatic

3 to 1 is adiabatic

Such a process does not exist because

a) heat is completely converted to mechanical energy in such a process, which is not possible

b) mechanical energy is completely converted to heat in this process, which is not possible

c) curves representing two adiabatic processes don’t intersect

d) curves representing an adiabatic process and an isothermal process don’t intersect

Answers (1)

The answer is the option (a) and (c).

The given process is cyclic, which starts at 1 and ends at 1.

So, dU=0

And dQ= dU+dW

dQ=dW

The heat energy supplied to the system gets converted to mechanical work which isn't possible by the second law of thermodynamics.

Posted by

infoexpert24

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