Composition is not a variable in one-component systems. A two-component system possesses a single composition variable. In general, a C-component system is characterized by C-1 independent compositions.

Several measures of composition (or concentrations) are available. The most commonly used is the mole fraction, which for component i is defined by:

n n is the total moles in the system and ni is the number of moles of component i. By definition, the sum of the mole fractions is unity.. The mole fraction unit is used for gas mixtures, nonaqueous liquid solutions, and solid solutions. In aqueous solutions, these units are generally avoided in favor of volumetric units such as moles or mass of i per unit volume of solution.

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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