# Chem Chapter 4 (gases)

 x atm = x mmHg = x  Pa 1 atm = 760 mmHg = 101,325 Pa Robert Boyle's Law Robert Boyle showed that for gas at a constant temperature, pressure and volume are inversely proportional. P1V1 = P2V2 Avogadro's Law Amadeo Avogadro postulated that V, the volume of a gas and n, the number of gas particles are directly proportional, when the temperature and pressure are held constant. V1      V2--- =  ---n1      n2 Gay-Lussac's Law Their data showed that for a container of gas held at constant pressure, the volume and temperature are directly proportional. P1      P2--- =  ---T1      T2 K = constant What is the number for atm? What is the number for Kpa atm K = 0.08206KPa    = 8.3145 What is the Ideal gas Law? PV = nRT Formula for Density is? D = Molar Mass (g/mol)      --------------------------       Molar Volume (L/mol) *You can get the mass from n (moles) D = PM      ----       RT m = molar mass How much does 1 mole of ideal gas occupy at STP? 22.4L The total pressure of all gasses in a sealed container is equal to what? Dalton's Law. The Pressure of each gas added together. Ptotal=P1+P2+P3+..... A partial pressure is the pressure exerted by just one type of gas in a mixture. What is the formula of partial pressure? P1=n1RT      ------  P Total        V P2=n2RT      ------ P Total          V etc....... What us the formula for mole fraction? The mole fraction, X, represents the concentration of the component in the gas mixture, so X1= moles of component 1      ---------------------------       total moles in mixture 1 gallon is how many liters? 3.785L Fahrenheit to Celsius (9/5)C + 32 = F Graham's Law of effusion Put the heavier gas on bottom. Authordsagent ID313298 Card SetChem Chapter 4 (gases) DescriptionGas formulas. Updated2015-12-16T14:48:45Z Show Answers