Chemistry 2214A/B Lecture Notes - Lecture 4: Ideal Gas, Real Gas
22 Jan 2015
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Document Summary
Condensation is the change in state from gas to a liquid. Some questions that need to be answered are: The graph below shows the condensation of co2, a real gas. The graph is an isotherm that includes the critical temperature, tc, which is the highest temperature at which a real gas condenses under pressure p pc. Note: condensation occurs at constant pressure until all gas becomes liquid. Using van der waals equation we can compare with the observations for the graph. So, we modify the van der waals equation by drawing a horizontal line that intercepts the curve with equal area above and below. Basically the isotherm of a real gas can be divided into three regions labeled below in the graph. The difference b/w an ideal gas and a real gas is that real gases will not strictly follow the law established for ideal gases, b/c of real-world characteristics. An ideal gas will follow the formula: pv = nrt.
