Semi-ideal gas

The formula for semi-ideal gas flow through a nozzle is commonly used to obtain the flow capacity of a safety valve14 -... 

Since specific internal energy is a function of temperature alone, it follows from equation (3.18) that specific enthalpy will be a function solely of temperature provided that Z and / . are either constant or functions of temperature only - conditions that are met for a nearideal and semi-ideal gas. Hence equation (3.16) may be replaced by the simpler ... 

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