Substances exist in different phase under different conditions. This is because, the gas forming the air to have the different condensation temperatures.įigure 4.2 Liquid water vapor mixture is a pure substance but a mixture of liquid and gas is not a pure substance. In contrast fluid is not pure substances that produce gas air mixture with air, because air is different from the chemical composition of the liquid gas. Liquid vapor mixture is a pure substance, since the chemical composition is the same in both phases. The oil and water mixture is considered a pure substance, as such a mixture of oil, water dissolved and do not form a homogenous chemical mixture is collected at the top.Ī pure substance in a mixture of two or more phases are combined, it enters phase of the pure material scope unless there is a difference in chemical composition. A) Selenium is one of the known elements.Figure 4.1 is a pure matter and nitrogen gas atmosphere.
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