# Announcements Im working on reading papers its a somewhat...

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10/22/17 1 Announcements I’m working on reading papers – it’s a somewhat slow process. I never read more than 5 or 6 papers without a break, so I don’t grade some when I’m feeling more tired. Smartwork homework due dates: Chapter 6 is due October 25 at 5:00 PM What we know about gases Key variables are P, V, T (and number of moles) Kinetic Molecular Theory allows us to understand macroscopic behavior while thinking about the molecules. Calculations can often be done using the ideal gas law (or things derived from it). These ideas help us understand atmospheric gases, like CO2 and other greenhouse gases. What’s left? We often encounter gases as mixtures, so we need to think about how to address that. We need to add a little more quantitative reasoning to our use of Kinetic Molecular Theory. We have to acknowledge that sometimes the ideal gas law isn’t a good enough model.

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10/22/17 2 Quick review… Cl 2 O is used to kill bacteria in some water treatment plants. Small amounts of this gas can be produced in the laboratory by the reaction, SO 2 (g) + 2Cl 2 (g) ---> SOCl 2 (l) + Cl 2 O(g). If you need 15.0 L of this gas for an experiment at 21 o C and 0.981 atm, and you have an excess of SO 2 (g), what mass of chlorine gas do you need to use? Answer: Mixtures of gases In many cases when we encounter gases they are mixtures Atmospheric gases are a good example because air is a mixture.
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• Fall '10
• Merrill

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