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Homework1 solutions - CHEM 131 F Paesani Homework No 1 on...

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CHEM 131 F. Paesani Winter 2011 Homework No. 1 – on Chapter 1 Due in class Wednesday, January 12 NOTE: I WILL ASSUME COMPLETE FAMILIARITY WITH THE MATERIAL OF CHAPTER 1. I WOULD SUGGEST THAT YOU DO AS MANY PROBLEMS IN THIS CHAPTER AS YOU CAN IN ADDITION TO THIS ASSIGNMENT. 1. True or false? Briefly explain your answers. A closed system cannot interact with its surroundings. False. There may be energy exchange between the closed system and its surroundings A homogeneous system must be a pure substance. False. For example, the air in a closed container is a homogeneous system although is composed of a mixture of N 2 , O 2 , CO 2 and H 2 O The Avogadro constant N A has no units. False. The unit is mol -1 The ratio PV/mT is the same for all gases in the limit of zero pressure (where m is the mass of the gas). False. PV mT = R M where M (molar mass) is different for each gas All ideal gases have the same density at 50 ºC and 3 bar.
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Homework1 solutions - CHEM 131 F Paesani Homework No 1 on...

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