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
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

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