Chem Chapter 4 (gases)

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  1. x atm = x mmHg = x  Pa
    1 atm = 760 mmHg = 101,325 Pa
  2. Robert Boyle's Law
    Robert Boyle showed that for gas at a constant temperature, pressure and volume are inversely proportional.

    P1V1 = P2V2
  3. 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
  4. 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
  5. K = constant
    What is the number for atm?
    What is the number for Kpa
    • atm K = 0.08206
    • KPa    = 8.3145
  6. What is the Ideal gas Law?
    PV = nRT
  7. 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
  8. How much does 1 mole of ideal gas occupy at STP?
    22.4L
  9. 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+.....
  10. 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.......
  11. 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
  12. 1 gallon is how many liters?
    3.785L
  13. Fahrenheit to Celsius
    (9/5)C + 32 = F
  14. Graham's Law of effusion
    Image Upload

    Put the heavier gas on bottom.
Author:
dsagent
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313298
Card Set:
Chem Chapter 4 (gases)
Updated:
2015-12-16 14:48:45
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chemistry gases
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Gas formulas.
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