Vapour Liquid Equilibrium Theory

distribution coefficient or K value:

where yi is the mole fraction of component i in the vapour phase and xi is the mole fraction of i in the liquid phase. The more volatile components of a mixture will have higher K values, and vice versa. In distillation, the efficiency of separation of two components is often compared via a quantity called the relative volatility aij:

Figure 1 The y-x behaviour of a binary mixture at constant temperature for various values of the relative volatility aij.

relative volatilities) is provided by thermodynamics and is discussed below. A more detailed discussion may be found in textbooks of thermodynamics (see Further Reading).

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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