【摘要】 本文介绍了焓在热力学工程中的一种解释，表明它是随物质迁移的能量；并讨论了可压缩气体系统的容积变化功与技术上可利用功的区别．更多还原

【Abstract】 Abstract An explanation of enthalpy in Engineering thermodynamics is presented．Itshows that the enthalpy is the energy transferred with moving working substance．The workin changing volume of a compressible gas system is also discussed，this work usually differsfrom that available technically.Key woeds enthalpy; work in a volume change；work available technically更多还原