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Up: Back to the Chemistry 2000 test index Chemistry 2000, Section A Spring 1996 Test 2 Solutions 1. It sublimes. 2. On the solid/liquid phase boundary, K =1. (Solid and liquid are in equilibrium and since the activities of pure solids and liquids are both 1, K =1.) In the portion of the phase diagram marked ``solid'', the solid, which is the reactant in the process described in this question, is favoured so we must have K <1. 3. The liquid-vapour coexistence curve tells us the values of P and T at which water boils. We can see that this curve moves to larger values of T when P is raised. Therefore, the boiling temperature increases with pressure. Bonus: The triple occurs at a specific temperature. Therefore, if we observe all three phases, we know exactly what the temperature must be. This is different from the behaviour of sublimation, melting and boiling temperatures which all vary with pressure. 2. The temperature generally drops overnight. Vapour pressure decreases when the temperature is
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This note was uploaded on 03/03/2012 for the course CHEM 2000 taught by Professor Roussel during the Fall '06 term at Lethbridge College.

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test2s-1 - Up: Back to the Chemistry 2000 test index...

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