Question

The efficiency of the reversible heat engine is ${\eta }_r$ , and that of irreversible heat engine is ${\eta }_i$ .Which of the following relation is correct?

• A. ${\eta }_r>{\eta }_i$
• B. ${\eta }_r<{\eta }_i$
• C. ${\eta }_r\ge {\eta }_i$
• D. ${\eta }_r>{\eta }_i$ and ${\eta }_r<{\eta }_i$

Answer 1

The correct option is C ${\eta }_r\ge {\eta }_i$

The amount of heat converted into work in a heat engine is always greater in a reversible process than in an irreversible process.

Therefore, the efficiency of a reversible process is always greater than an irreversible process.