1.
Which law compares gases at two different sets of conditions, with temperature as a constant and pressure and volume as variables?
2.
If the pressure of a gas is 1.2 atmospheres with a volume of 12 L, how much pressure is exerted by the gas if the volume is changed to 9L? (Assume constant temperature)
3.
If the pressure of a gas is 103.2 kPa at a temperature of 100 Celsius and a volume of 4L is changed to a lower pressure of 80 kPa and 100 degrees celsius, what will be the new volume? (Hint: kPa is kilo pascals -- a unit of measure for pressure).
4.
A gas at a temperature of 80Celsius and a volume of 3.2 Liters is brought into an area with a temperature of 100 Celsius, what is the new volume if the pressure remains constant?
Hint 1: This is Charles law (V1/T1 = V2/T2)
Hint 2: ALL GAS PROBLEMS MUST use the KELVIN temperature scale.
(To change from Celsius to Kelvin: add 273)
5.
A gas at a temperature of 34 Celsius and a volume of 6.3 Liters is brought into a new area where the gas expands to a volume of 8.0 Liters. What is the new temperature? (Assume constant Pressure)
6.
A gas in a balloon measures 3.6 L, 0.9 atmospheres, and 34 degrees Celsius. The environment is changed and the balloon is now 1.4 atmospheres at a temperature of 38 degrees Celsius. What is the new volume?
7.
What is the volume of 2 moles of Helium at a temperature of 32 degrees Celsius and a pressure of 1.1 atmospheres?
Given R = 0.08321 Latm/molK and 8.314 kPa L/mol K
Hint: There is only 1 set of conditions for this gas problem and the moles of the gas is given.
This indicates the ideal gas law: PV = nRT.
Remember that n is equal to the number of moles.
P is the pressure, V is the volume and T is the temperature (change to Kelvin).
The R MUST match the units in the rest of the problem.
IF pressure is given in atmosphere, then use R = 0.08321 Latm/molK .
IF pressure was given in kPa, then use 8.314 Kpa L/mol K
Note also that volume MUST be in Liters and Temperature (as for all gas problems) must be in Kelvin.
8.
What is the temperature of 3.4 moles of Helium at a pressure of 1.1 atmospheres and a volume of 3.7 Liters? (What is the temperature in Kelvin?)
Given R = 0.08321 Latm/molK and 8.314 kPa L/mol K
9.
How many moles are present in a container that is 79.9 Liters with a pressure of 105 kPa and a temperature of 24 degrees Celsius?
Given R = 0.08321 Latm/molK and 8.314 kPa L/mol K
10.
According to Charles Law, if you have a balloon inside a car at noon during a hot summer day the balloon molecules inside will increase in pressure.
11.
In a nitrogen gas occupies has a volume of 500ml at a pressure of 0.971atm.What volume
will the gas occupy at a pressure of 1.50 atm, assuming the temperature remains constant?
12.
Not all Gas Law problems have Kelvin (K) as the unit of temperature. They can be expressed in Celsius (°C)and Fahrenheit(°F). So convert 123°C to K.
13.
Gas pressure is caused by
A.
B.
Gas molecules reacting with other gas molecules
C.
Gas molecules hitting the walls of a container
D.
Gas molecules hitting other gas molecules
14.
At a pressure of 5.0 atmospheres, a sample of gas occupies 40. liters. What volume will the same sample occupy at 1.0 atmosphere?
15.
As the volume of confined gad decreases at a constant temperature, the pressure exerted by the gas ______
16.
1. A sample of argon has a volume of 0.43 mL at 299K. At what temperature in degrees Celsius will it have a volume of 1 mL.
17.
Each of these flasks contains the same number of molecules. In which container is the pressure highest?
18.
Why would the pressure of a sample of gas at a constant volume fall 75 mmHg?
A.
B.
The temperature increased
C.
The temperature decreased
D.
Fewer particles were present
19.
If two moving steel balls collide, their total energy after the collision is the same as before. This is an example of
A.
B.
C.
D.
Both Boyle's and Charles's law.
20.
A sample of oxygen occupies 560. mL when the pressure is 800.00 mmHg. At constant temperature, what volume does the gas occupy when the pressure decreases to 700.0 mmHg?
21.
What pressure (atm) is exerted by .750 mol of a gas at a temperature of 273 K and a volume of 5.00 L?
22.
A sample of gas at 25ºC has a volume of 11 L and exerts a pressure of 660 mmHg. How many moles of the gas are in the sample?
23.
The pressure is the force per unit.
24.
A 180.0 mL volume of gas is measured at 87ºC. If the pressure remains unchanged, what is the volume of the gas at standard temperature?
25.
A gas sample with a mass of .467 g is collected at 20ºC amd 732.5 mmHg. The volume is 200. mL. What is the molar mass of the gas?