Target: 10 Questions in 10 minutes
An IB Chemistry data booklet is helpful

1. Which of the following is NOT a characteristic of an ideal gas?
 A. There is a weak attractive force between the molecules
 B. Gas molecules occupy a negligible volume
 C. Gas molecules are in random motion
 D. Only elastic collisions occur between molecules
 
2. Which graph represents the relationship between the pressure (in Pa) and the volume (in dm^{3}) of a fixed mass of an ideal gas at constant temperature?


3. The deviation between real gas and ideal gas behavior is greatest at ...
 A. high temperature and low pressure
 B. high temperature and high pressure
 C. low temperature and low pressure
 D. low temperature and high pressure
 
4. What will happen to the pressure of a fixed mass of gas if the temperature (in K) and the volume are both doubled?
 A. It will remain the same
 B. It will increase by a factor of 2
 C. It will increase by a factor of 4
 D. It will decrease
 
5. A fixed mass of a gas occupies 40cm^{3} at 26.85°C. At what temperature, in °C, will the volume of gas be 80cm^{3} if the pressure remains constant?
 A. 53.85
 B. 149.85
 C. 326.85
 D. 599.85
 
6. The pressure and temperature (in K) of a fixed mass of gas are both halved. If the initial volume of the gas was 100cm^{3}, what is the new volume?
 A. 50cm^{3}
 B. 100cm^{3}
 C. 200cm^{3}
 D. 400cm^{3}
 
7. Which graph represents the relationship between the volume (in cm^{3}) and the temperature (in °C) of a fixed mass of an ideal gas at constant pressure?
 
8. How many moles of gas are in a container of volume 2000cm^{3} at 100kPa pressure and a temperature of 400K?
(R = 8.31 J K^{1} mol^{1}) 


$${100 \times 2000} \over{8.31 \times 400}$$ 

$${100 \times 2} \over{8.31 \times 400}$$ 

$${100 \times 2000} \over{8.31 \times 127}$$ 

$${100 000 \times 2000} \over{8.31 \times 400}$$ 
 
9. A fixed mass of gas is at a pressure of 4kPa.
The volume of the gas is halved and the temperature (in K) of the gas is doubled.
What is the new gas pressure after these changes?
 A. 1kPa
 B. 4kPa
 C. 8kPa
 D. 16kPa
 
10. What is the molecular mass of gas Z if 2.00g of the gas occupies a volume of 500cm^{3} at 24.85°C and 1.01 x 10^{5} Pa?
(R = 8.31 J K^{1} mol^{1}) 


$${2.00 \times 8.31 \times 24.85} \over{1.01 \times 10^5 \times 0.5}$$ 

$${1.01 \times 10^5 \times 0.5} \over{2.00 \times 8.31 \times 298}$$ 

$${2.00 \times 8.31 \times 298} \over{1.01 \times 10^5 \times 5 \times 10^{4}}$$ 

$${1.01 \times 10^5 \times 5 \times 10^{4}} \over{2.00 \times 8.31 \times 298}$$ 


