Boyle's Law
volume and pressure are ____ related
inversely
volume and temperature are ____ proportional
directly
1 atm = ___ torr = ___ mmHg
what is the ideal gas law
PV=nRT
What two equations will you use?
PT = PA + PB + PC...
PA = XA + PT
A sealed container at constant temperature holds a gas. Initially the pressure is 1.50 atm and the volume is 8.0 L. The volume is then changed to 5.0 L.
What is the new pressure of the gas?
2.40 atm
What are the units always used for temperature in the gas laws?
Kelvin
0oC = ___ K
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Do you add subtract or neither?
add
A weather balloon contains 8.80 moles of helium at a pressure of 0.992 atm and a temperature of 25° C at ground level. What is the volume of the balloon under these conditions?
217 L
A gas mixture at 312 K has a total pressure of 1,250 mmHg. The mixture contains 2.10 mol of O₂, 4.55 mol of N₂, and 0.765 mol of Ne. What is the partial pressure of the Ne in atm?
0.1697 atm
A gas occupies 10.0 L at a pressure of 0.800 atm. If the pressure is increased to 1.20 atm, what is the new volume of the gas?
6.67 L
A balloon has a volume of 2.50 L at 20.0 °C. If the temperature is increased to 80.0 °C (pressure constant), what is the new volume?
3.01 L
What are my session times?
Wednesday 3:15-4:15
Friday 11:15-12:15
The volume of an automobile air bag was 66.8 L when inflated at 25 °C with 77.8 g of nitrogen gas. What was the pressure in the bag in atm?
1.02 atm
A 4.36 L container holds 0.27 moles of helium (He) and 0.12 moles of argon (Ar) at 12oC. What is the mole fraction of helium?
0.27/0.39 = 0.69
A gas is in a container at 2.50 atm and the volume is 3.60 L. If the volume changes to 5.00 L (with temperature constant), what is the new pressure?
1.80 atm
A sample of gas has a volume of 3.00 L at 15.0 °C. After heating, it has a volume of 5.50 L. What is the final temperature (pressure constant)?
528.0 K
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Do you add subtract or neither?
subtract
How many moles of gaseous boron trifluoride, BF3, are contained in a 4.3410-L bulb at 788.0 K if the pressure is 1.220 atm?
0.08190 mol
A 4.36 L container holds 0.27 moles of helium (He) and 0.12 moles of argon (Ar) at 12oC. What is the partial pressure of helium?
1.44 atm
A sample of gas is initially at 0.650 atm and occupies 8.00 L. The volume is reduced to 3.20 L. What is the resulting pressure?
1.625 atm
A gas occupies 7.20 L at 105.0 °C. The container is then cooled until the gas has a volume of 5.00 L. What is the temperature in Kelvin after cooling?
262.8 K
What is STP
1 atm
273 K
A cylinder of medical oxygen has a volume of 35.4 L, and contains O2 at a pressure of 151 atm and a temperature of 25 °C. What volume of O2 does this correspond to at normal body conditions, that is, 1 atm and 37 °C?
5561 L
A storage tank contains 2 moles Ar, 3 moles O2, and 5 moles of N2 at a total pressure of 1000 torr. Calculate the partial pressure of each gas.
Ar = 0.26 atm
O2 = 0.39 atm
N2 = 0.66 atm