Chem 219: Exam 3 Questions with Correct Solutions

Chem 219: Exam 3 Questions with Correct Solutions Avogadro's Law - Answer -equal volumes of gases at the same temperature and pressure contain equal numbers of molecules Boyle's Law - Answer -Boyle's Law states that at constant temperature and moles, pressure and volume are inversely proportional. Mathematically this is written as: PV = PV Charles' Law - Answer -the law that states that for a fixed amount of gas at a constant pressure, the volume of the gas increases as the temperature of the gas increases and the volume of the gas decreases as the temperature of the gas decreases Gay-Lussac's Law - Answer -the pressure of a gas is directly proportional to the Kelvin temperature if the volume is constant Combined Gas Law - Answer -the relationship between the pressure, volume, and temperature of a fixed amount of gas Ideal Gas Law - Answer -PV=nRT R=.0821 If 5.00 g of Gas A and 5.00 g of Gas B are mixed in the same container, and the partial pressure of Gas B is determined to be twice that of Gas A, what do we know about the gases? - Answer -If Gas A has half the partial pressure of Gas B, this indicates that there are fewer moles of it at the same mass, and therefore Gas A has twice the molar mass of Gas B mol fraction and partial pressure - Answer -the formula for both Amonton's Law - Answer -if the volume of a gas is held constant, increasing the temperature of the gas increases its pressure. Boyle's Law in terms of KE - Answer -Volume decreased, wall area decreased = increased pressure Avagadro's Law in terms of KE - Answer -Container pressure constant, more gas molecules added = increased volume Dalton's Law - Answer -The total pressure of a mixture of gases is the sum of the individual pressures (Ptotal=P1+P2+P3...) The kinetic energy (KE) of a particle of mass (m) and speed (u) is given by - Answer -KE = 1/2 mu^2