Is it possible for a heat engine to operate as shown in the following diagram? Explain, using the laws of thermodynamics.   Q408: Is it possible for the efficiency of a heat engine to equal 1?...

Is it possible for a heat engine to operate as shown in the following diagram? Explain, using the laws of thermodynamics.

Q408:

Is it possible for the efficiency of a heat engine to equal 1? Explain.

1. Can a Carnot engine operate in an irreversible manner? Explain.

2. Does a gasoline-burning automobile engine operate in a reversible manner? Explain.

3. Which would have the greater efficiency—a Carnot engine operating between the temperatures of 400°C and 300°C, or one operating between the temperatures of 400 K and 300 K? Explain.