10 Questions |
By ChoiceAdvancemen | Last updated: Jul 12, 2015
| Total Attempts: 64
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Boyle's, Charles', Ideal Gas Law, Combined gas law.
Questions and Answers
1.
Which law compares gases at two different sets of conditions, with temperature as a constant and pressure and volume as variables?
A.
Charle's Law
B.
Boyle's Law
C.
Combined Gas Law
D.
Ideal gas law
2.
If 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)
A.
.9 L
B.
129.6 L
C.
6.0 L
D.
1.6 L
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).
A.
2,064 L
B.
0.3225 L
C.
5.16 L
D.
3.1 L
4.
A gas at a temperature of 80Celsius and a volume of 3.2 Liters is brought into an area with the 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)
A.
3.38 L
B.
2.84 L
C.
3.75 L
D.
2.4 L
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)
A.
43.17 K
B.
389.84 K
C.
0.164 K
D.
1.48 K
6.
A gas in a balloon measures 2.2 L 1.1 atmospheres and 32 degrees Celsius. The environment is changed and the balloon is now 1.8 L and 1.4 atmospheres. What is the new temperature?
Hint 1: Always change temperature to Kelvin scale.
Hint 2:
Pressure volume and temperature are all changed.
Use the combined gas law:
A.
317.6 K
B.
33.32 K
C.
384.3 K
D.
0.02 K
7.
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?
A.
2.59 L
B.
4.6 L
C.
220,961 L
D.
2.34 L
8.
What is the volume of 2 moles of Helium at a temperature of 32 degreees 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 are 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.
A.
13.96 L
B.
.45 L
C.
46.14 L
D.
4,610 L
9.
What is the temerature 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
A.
14.39 K
B.
12.15 K
C.
0.1 K
D.
142 K
10.
How many moles is 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
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