Tips of Study for Chapter 10: Gases 1. Common Misconceptions and Special Attention to be paid • Always use Kelvin temperature in solving gas problems. • Always make sure that units among all parameters are the same in solving gas-law problems. Conversions are often required in this process. • Do not confuse the standard conditions for gas behavior (STP) with the standard conditions in thermodynamics in chapter 5. • Effusion and diffusion are different. 2. Key Points • The two key points for this chapter are: Perfect gas law PV = nRT (explain the bulk properties of gases or perfect gases), and the kinetic-molecular model or kinetic model of gases (Fig. 10.17) (this model explains, at the molecular level , the origin of pressure and the effect of temperature on pressure). So, understand the assumptions (in your book they are called 5 statements on page 421). A very useful way to help you understand this model is to picture these assumptions using Fig. 10.17
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