过热蒸汽通过绝热可逆膨胀,对外做功为<img src="https://zk.995w.com/lqwvjeImg/6e/6e14ef1d25358571d09c82571a0eec24.png" style="font-size: 14px;">,经计算此过程的理想功为<img src="https://zk.995w.com/lqwvjeImg/c1/c17f3c7b31280aac6f5da091bcbc9a4a.png" style="font-size: 14px;">,则<img src="https://zk.995w.com/lqwvjeImg/c1/c17f3c7b31280aac6f5da091bcbc9a4a.png" style="font-size: 14px;">( )<img src="https://zk.995w.com/lqwvjeImg/6e/6e14ef1d25358571d09c82571a0eec24.png" style="font-size: 14px;"><br>·大于<br>·小于<br>·相等<br>·不能确定