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Ideal Gas Laws

Total questions: 24

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
In order to convert to Kelvin, you add ______ to the Celsius measurement.
a)
372
b)
273
c)
237
d)
732
2.
What is 50 C in Kelvin?
a)
223
b)
323
c)
100
d)
50
3.
100 degrees Celsius is equal to _______ Kelvin. 
a)
0 K
b)
273 K
c)
173 K
d)
373 K
4.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
5.
Which of the following would increase the (gas) pressure of a system?
a)
Increase the Temperature
b)
Pump in more gas
c)
Decrease the volume
d)
All of these
6.
The following graph shows ____ relationship. 
a)
Direct
b)
Inverse
7.
Boyle's law :  The pressure and volume of a gas show a _____ relationship. 
a)
Inverse 
b)
Direct 
8.
In the ideal gas law, which variable represents the gas constant?
a)
n
b)
R
c)
T
d)
V
9.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm (make sure you use the correct R value).
a)
7.18 L 
b)
7.81 L
c)
4.63 L
d)
4.36 L
10.
You have a gas that has a pressure of 2 ATM and a volume of 10L.  What would be the new volume if the pressure was changed to 1 ATM?
a)
5 L
b)
20 L
c)
It would stay at 10L
d)
1 L
11.
A sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC.  What is the new volume of the gas?
a)
60.0 mL
b)
15.0 mL
c)
27.5 mL
d)
32.5 mL
12.
A sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?
a)
72 mL
b)
144 mL
c)
216 mL
d)
288 mL
13.
Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 
a)
0 K 
b)
107 K 
c)
207 K 
d)
307 K 
14.
Three gases, Ar, N2 and H2 are mixed in a sealed container. Ar has a pressure of 255 torr, N2 has a pressure of 228torr and H2 has pressure of 752torr. What is the total pressure in the container?
a)
483torr
b)
270torr
c)
1235torr
15.
A container is filled with H2, and H2O. Calculate the partial pressure of H2 when the pressure of water is 17torr. The total pressure of the gases is 750torr.
a)
767.5torr
b)
732torr
c)
42.86torr
16.
Determine the number of moles in a container of gas at STP with a volume of 99.2 L. 
a)
2222.08 moles
b)
4.43 moles
c)
22.4 moles 
d)
76.8 moles
17.
Determine the initial temperature of a random gas when the initial volume is 2.2 L and it is cooled to 88K with a volume of 0.85 L. 
a)
0.029 K
b)
0.021 K
c)
227.76 K
d)
34 K
18.

What is STP?

a)

1 Degrees Celsius and 0 ATM

b)

0 Degrees Celsius and 1 ATM

c)

0 Kevin and 10 ATM

d)

273 Celsius and 273 ATM

19.

Adding more gas molecules to an equal size container held at a steady temperature will:

a)

Increase the pressure because there are more molecules, and therefore the sides of the container will be hit more often.

b)

not affect the pressure.

c)

Increase the pressure because the molecules will be moving faster.

20.

Which formula would you use to solve the following equation?

If I have 23 L of Ar at a pressure of 12 atm and a temperature of 200 K, and then I increase the pressure to 14 atm and the temperature to 300 K, what is my new volume?

a)

PV=nRT

b)

Not enough information is given.

c)

P1V1/T1 = P2V2/T2

21.

Which formula would you use to answer the following problem?

At what temperature will 0.654 moles of neon gas occupy 12.30 liters at 1.95 atmospheres?

a)

PV=nRT

b)

P1V1/T1=P2V2/T2

c)

Not enough information is given.

22.

When using the ideal gas law (PV=nRT), how does the type of gas being examined affect the outcome?

a)

It has no affect--the formula is a good approximation for all gases.

b)

You need to pay close attention to the type of gas--Helium and the Noble gases use a different equation

c)

Because each gas has a unique molecular mass, that difference needs to be accounted for.

d)

Using an isotope or an ion will change your results.

23.
According to Boyle's law of PV, at constant temperature, as the pressure of a given sample of gas is increased, the volume will –
a)
Increase
b)
Decrease
c)
Remains the same
24.
What variable should be placed in the blank to complete the following expression of the ideal gas equation:  PV = nR___?  
a)
boiling point of the gas in Kelvins 
b)
temperature of the gas in Celsius
c)
temperature of the gas in Kelvins 
d)
density of the gas in g/cm3

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