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Consider a cycle followed by an engine, ...

Consider a cycle followed by an engine, (figure)

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.

Text Solution

Verified by Experts

The correct Answer is:
A, C
In the given one complete cycle `1rarr2rarr3rarr1`, the system returns to its initial state.
`:. dU= 0` and `dQ=dW` i.e., heat is completely converted into mechanical energy, which is not possible in such a process. Further, the two adiabatic curves (2 3) and (3 1) carnot intersect each other. Choices (a) and (c ) are correct.
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