Test Your Knowledge: Laws and Their Names By: Tyler Messenger

Name the Law You will be shown an equation, and must name the law that explains it

Name the Law PV = nRT Ideal Gas Equation, with P = pressure (atm), V= volume (Liters), n = moles of gas, T = temperature (K), and R = .0821 L-atm/mol-K

Name the Law PA = XA * P⁰A Raoult’s Law, where PA = Partial Pressure exerted by vapor of a solution, XA = mole fraction of the solvent, P⁰A = vapor pressure of the pure solution

Name the Law P₁V₁/T₁ = P₂V₂/T₂ Combined Gas Law

Name the Law P₁V₁ = P₂V₂ Boyle’s Law

Name the Law PTotal = ∑PPartial Dalton’s law of Partial Pressure, where the sums of Partial Pressure in a gas are equal to the total Pressure on the Gas

Name the Equation Name the Equation based off of the name of the Law

Name the Equation What is the equation for Charles’s Law? V₁/T₁ = V₂/T₂

Name the Equation Avogadro's Law V₁ / n₁= V₂ / n₂, where V is the volume, and n is the amount of gas in moles

Name the Equation Hess’s Law ∆H⁰Reaction= ΣΔHf(Products) - ΣΔHf(Reactants) which means that the total change in enthalpy is equal to the difference of the Heat of Formation of the Products and the Heat of Formation for the Reactants

Application of a Law How does the temperature of a gas change as its pressure is lowered? Gay-Lussac’s Law states that temperature and pressure are directly proportional, making temperature decrease as pressure decreases.