問題如下
Steam at a constant pressure of 30 atmospheres is admitted to the cylinder of
a steam engine. the length of the stroke is 0.5m and the diameter of the
cylinder is 0.4m. How much work is done by the steam per stroke?
我想要用W=beta times PVdT - kappa times PVdP
可是我發現我不知道水蒸氣的expansivity還有isothermal compressibility
後來我想說 假設他是定壓 dP就等於零 只要知道expansivity就可以 可是又發現我不
知道溫度變化
救命啊~~~這題要怎麼解阿 我只知道V=2pi *10^-4
--
一雙哀傷的眼神是一段的痛心疾首過去
憂鬱是幸福的另一面
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 111.249.128.178