specific entropy

Arbitrarily selecting two property parameters among pressure, temperature, specific volume ( or density), entropy, enthalpy and internal energy as the input variables, the rest, the thermal conductivity and viscosity could be calculated.

以压力、温度、比容（或密度）、焓、熵、内能中任意两个作为输入参量，可以计算其余热力参量、热导率以及动力粘度等输运性质。

In calculation of vapour phase entropy, assuming that the equilibrium pressure of liquid-vapour is so small that the specific heat equation of ideal gas could be used, the entropic expression of vapour phase could be derived and a group of isobaric curves could be plotted.

计算汽相熵值时假定溶液汽液两相平衡时压力较低，可以引用理想气体的比热关系式，因此可推导出汽相熵的表达式，据此表达式可以描绘出一组汽相等压线。

Specific examples are given to calculate the entropy change for a number of different processes.

给出具体的例子来计算不同的进程数熵变.