# Temperature and Gas Lab

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Pressure Temperature Relationships in Gases Abstract The purpose of this experiment was to determine the pressure, temperature properties of a specific volume of liquid. This experiment developed our understanding between the temperature of gas and the pressure it exerts. Materials used in this experiment were LabQuest, Vernier Gas Pressure Sensor, Temperature Probe, ice, hot plate, 125 mL Erlenmeyer flask, ring stand, and plastic tubing with two connectors. We measured pressure and temperature for ice (92.90 kPa and 273.7 K), room (100.91 kPa and 294.9 K), boiling (124.01 and 368.1 K), and warm (110.01 kPa and 322 K). Introduction When a substance is in the gas state, its molecules are very spread out and are in constant motion. They are in constant collision with the walls of their container. The speed of the molecules in a gas depends on the environment around it. Environmental conditions around the molecules, such as temperature affect the speed. For example, if the temperature increases, then the speed of the molecules increases. If the temperature decreases, the speed of the molecules decreases. For instance, if you have a balloon filled with helium, and if you put it in the freezer, the size of the balloon will decrease because the molecules are slowing down. The opposite thing happens when you increase the heat. Think of a hot air balloon, for instance. If you increase heat in the hot air balloon, it will increase in size and pressure. We have equipment to measure temperature and pressure of the liquid and gas. A LabQuest/LabQuest App measures the temperature and it measures the pressure for us instantly in the units we need. A Vernier gas pressure sensor can be used to measure changes in pressure of a gas. Experiment: There was a list of steps in order to understand the Pressure-Temperature relationships. The first thing we did was set up a