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### 27 Cards in this Set

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 Compressibility measure of how much the volume of matter decreases under pressure. Why are gases easily compressed? Because of the space between the particles in a gas. What factors affect gas pressure? The amount of gas, volume and temperature. Boyle's Law For a given mass of of gas at a constant temperature, the volume of the gas varies inversely with pressure. Boyle's Law equation P1 x V1 = P2 x V2 Charles's Law the volume of a fixed mass of gas is directly proportional to its Kelvin temperature if the pressure is kept constant. Charles's Law equation V1/T1 = V2/T2 Gay-Lussac's Law the pressure of a gas is directly proportional to the Kelvin temperature if the volume remains constant. Gay-Lussac's Equation P1/T1 = P2/T2 The Combined Gas Law The combined gas law allows you to do calculations for situations in which only the amount of gas is constant Combined Gas Law Equation P1 x V1/T1 = P2 x V2/T2 Ideal Gas Law To calculate the number of moles of a contained gas requires an expression that contains the variable n. The gas law that includes all 4 variables - P, V, T and n is the ideal gas law. Ideal Gas Law equation P1 x V1/T1 x n1 = P2 x V2/T2 x n2 OR P x V = n x R x T or PV = nRT What is the value of the ideal gas constant R? r = 0.0821 L x atm/mole x K or 8.315 dm3 x kPa/mole x K When do real gases differ most from an ideal gas? at low temperatures and high pressures Dalton's Law of partial pressures at constant volume and temperature, the total pressure exerted by a mixture of gases is equal to the sum of partial pressures of the component gases Dalton's equation P total = P1 + p2 +p3+... How many liters does 1 mole of gas occupy at standard tyemperature (273K) and pressure(101.3kPa) (STP)? 22.4L Avogadro's Principle V1/n1 = V2/n2 1 atmosphere is equal to how many kPA? 1 atm = 101.3kPA How many mm HG is 1 atmosphere equal to? 1 atmosphere is equal to 760 mm HG; converting kPa to atmospheres 1 atmosphere/101.3 kPa converting kPa to mm HG 760mm HG/101.3kPa Kelvin boiling point 373 degrees Kelvin Kelvin freezing point 273 degrees Kelvin 1 bar is equal to 14.503774 pounds per square inch (psi) 1 torr 1 mmHG at 0 degrees Celsius