Combined Gas Laws
500.0 liters of a gas in a flexible-walled container are prepared at 700.0 mmHg and 200.0 °C. The gas is placed into a tank under high pressure. When the tank cools to 20.0 °C, the pressure of the gas is 30.0 atm. What is the volume of the gas?
9.51 L
If I have 6 moles of gas at 3.3 atm and 13 L, what would the T be? write your answer in 3 sig figs
87.1 K
Convert 338 L at 63.0 atm to its new volume at standard pressure.
21,300 L
If I am converting a pressure messured in torr to mm Hg, what must I do?
Nothing!
How do I calculate delta ∆V?
Vfinal - Vinitial
What is the volume of gas at 2.00 atm and 200.0 K if its original volume was 300.0 L at 0.250 atm and 400.0 K.
18.75 mL
If I have 3.7 moles of gas at 5 L and 210 K, what would the Pressure be? write your answer in 3 sig figs and atm.
12.8 atm
At 27.00 °C a gas has a volume of 6.00 L. What will the volume be at 150.0 °C?
8.46L
Convert 72.5 oF to K
296K
What is R? Show me the value and the units.
R= 0.0821 L*atm/mol*K
If I start with 14 mL at 20.0 °C and 1.2 atm, and heat it to 41 °C while increasing the pressure to 2.2 atm, what would be the new volume? Write your answer in 3 sig figs.
8.18 mL
Determine the volume occupied by 2.34 grams of carbon dioxide gas at STP.
1.19 L
A 30.0 L sample of nitrogen inside a rigid, metal container at 20.0 °C is placed inside an oven whose temperature is 50.0 °C. The pressure inside the container at 20.0 °C was at 3.00 atm. What is the pressure of the nitrogen after its temperature is increased to 50.0 °C?
3.31atm
What is 125.0 psi in atm?
8.50 atm
What equation do we use to calculate the total pressure of a system based on the individual pressures of the components in the system?
Dalton's Law of partial pressures
Ptotal= P1 + P2 + P3 ...
A balloon of air now occupies 10.0 L at 25.0 °C and 1.00 atm. What temperature was it initially, if it occupied 9.40 L and was in a freezer with a pressure of 0.939 atm? Write your answer using 2 sig figs in °C.
-10 °C
If I have 0.7 moles of gas at 1.3 atm and 43 L, what would the T be? Write your answer in °C using 3 sig figs
700 °C
A mixture of gases with a pressure of 600.0 mmHg contains 70 percent nitrogen and 30 percent oxygen by volume What is the partial pressure of oxygen in this mixture?
180 mmHg
Convert 103.5 oF to oC and K.
= 39.72 oC and 312.9K
Which type of energy is the sum of a
substance’s kinetic and potential energies?
Internal Energy
At conditions of 785.0 torr of pressure and 15.0 °C temperature, a gas occupies a volume of 45.5 mL. What will be the volume of the same gas at 745.0 torr and 30.0 °C?
50.4 mL
5.600 g of solid CO2 is put in an empty sealed 4.00 L container at a temperature of 300 K. When all the solid CO2 becomes gas, what will be the pressure in the container? Answer in 2 sig figs.
0.7 atm
What volume (in L) will 5.5 g of oxygen gas occupy if 2.2 g of the oxygen gas occupies 3.0 L? (Under constant pressure and temperature.)
7.5 L
What are the signs for heat and work for a gas that warms and, at the same time, is
expanded?
+q and -w
If I have a cup of water that feels really hot to the touch, what kind of reaction is taking place inside that cup? (exothermic or endothermic)
Exothermic! ( heat is being released from the cup to the surroundings)