Demonstration of Temperature Change Essay

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Islamic University of Gaza Faculty of Engineering Mechanical Engineering Department EMEC 3111: Thermal Science Laboratory Experiment Number | 01 | Experiment Title | Demonstration of Temperature Change | Date of Experiment | 16-02-2013 | Date of Submission | 20-02-2013 | Student Name | Faisal F. Safadi | Student Number | 120101964 | Lab. Instructors | 1. Dr. Mohammed Alnahhal 2. Eng. Zead Abu Abdou | Remarks | | Objectives * To give a simple demonstration of how temperature of a fixed amount of gas changes as its pressure changes. * To become familiar with boyle’s law apparatus. Introduction and Theory Pressure affects temperature, increasing pressure increases the temperature. This is because you're smashing the molecules/atoms closer together, so they bump into each other more often, so they are higher energy. Temperature is a measure of this average kinetic energy, so giving anything energy means increasing its temperature. Exerting a (positive) pressure on something is one way to give it energy. * The pressure of a gas of fixed mass and fixed volume is directly proportional to the gas absolute temperature. Fig (1): Illustration of pressure varying with temperature. Simply put, if a gas temperature increases, then so does its pressure if the mass and volume of the gas are held constant. The law has a particularly simple mathematical form if the temperature is measured on an absolute scale, such as in kelvins. The law can then be expressed mathematically as: or Where: P is the Pressure of the gas (measured in ATM). T is the temperature of the gas (measured in Kelvin). k is a constant. This law holds true because temperature is a measure of the average kinetic energy of a substance; as the kinetic energy of a gas increases, its particles collide with the container walls more rapidly, thereby exerting

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