9-11-08[lecture4]ll

9-11-08[lecture4]ll - Phases Changes and Phase Diagrams...

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Phases Changes and Phase Diagrams Lecture 4 9/11/2008 (LL) The iclicker question: pg.2 When you have two gases in two tubes and the valves open the gases move between the tubes. The speed at which the molecules move depend on the Molecular Weight of the gas. The lighter the gas the faster it moves. Slower gas moves slower. A cloud of gas is formed closer to HCl than NH 3 because HCl has a larger mass and therefore the particles move slower than the NH 3 particles Gas Mixtures Pressure is related to the number of times the particles in the gas hit the walls of the container Total Pressure= The sum of each partial pressure from each component in the gas What use are partial pressures In the experiment the water bath contains gas from the reaction and gas from water with vapor pressure In a warmer room there is more energy and more water vaporizes As the reaction occurs gas is produced and bubbles in the open tube, then gas is captured inside the jar Collecting Water
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9-11-08[lecture4]ll - Phases Changes and Phase Diagrams...

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