CHEM1100 Study Guide - Van Der Waals Equation, Intermolecular Force, Kinetic Energy

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25 Nov 2013
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Iupac standard pressure = 273. 15 k and 1 bar. All calculations done in kelvin must not be negative values (lowest temperature is 0k) Particles in constant motion collide with container walls (surroundings) each have a mass and velocity. Pressure = measure of collisions per unit area per unit time. Barometer: pressure of the atmosphere on the surface of the mercury balances the pressure of the column of mercury. Contemporary devices: pressure sensors (transducers) measure the difference between two pressure points electronically. Pressure exerted by a gas held at a constant temperature is inverse to the volume of the gas. Gas comprised of loosely spaced molecules moving at randm. Gas molecules hit walls of container more frequently and exert increas pressure. Gas compressed, pushing the molecules closer together to occupy less volume. If the pressure of a gas remains constant, the volume of the gas will increase as the temperature increases. Increased temperature = gas takes up more space.

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