Question

A heat engine receives 1000 J of heat from a reservoir at 1000 K and rejects 600 J of heat to a sink at 300 K. This engine is

• A. Reversible
• B. Irreversible
• C. Impossible
• D. Perfectly efficient

Hint:

Alternatively, apply the Clausius inequality directly: \[ \oint \frac{\delta Q}{T} = \frac{Q_H}{T_H} - \frac{Q_C}{T_C} = \frac{1000}{1000} - \frac{600}{300} = 1 - 2 = -1 \] Since \(\oint \frac{\delta Q}{T} < 0\), the cycle is completely possible but fundamentally irreversible.

Answer 1

The Correct Option is B