R.pdf - Determination of the Gas Constant R General Chemistry Spring 2009 Dr Fred Safarowic Background To describe the state of a gas four variables are

R.pdf - Determination of the Gas Constant R General...

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Determination of the Gas Constant, R General Chemistry - Spring 2009 Dr. Fred Safarowic Background To describe the state of a gas four variables are required: pressure, temperature, quantity and volume. The gas laws describe the relationship between these variables. The first relationship was determined by Boyle whose results are summarized in equation 1: PV = constant (1) Charles then determined the relationship between volume and temperature: V = constant x T (2) Finally, Avogadro showed that there was a relationship between the amount of gas in moles and the volume: V = constant x n (3) Solved algebraically, these equations combine to form the Ideal Gas Law. PV = nRT (4) where R is the constant indicated in equations 1-3 with units that depend on the units of the other four variables. In this experiment, you will prove the value of R in L-atm/mol-k by producing a measured amount of hydrogen gas. Partial Pressures Since gases are colorless and usually odorless, it is necessary to capture them by displacing a liquid, usually water, in a closed system. However, when a gas passes through a
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  • Spring '18
  • Olsen
  • Chemistry, Vapor pressure, gas measuring tube

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