Gas laws Revision Questions

A method on how to calculate the partial pressure of a gas present in a mixture of gasses in a closed container.

• Pt = P1 + P2…

• P1V1/T1 = P2V2/T2

• P1V1=P2V2

• V1/T1=V2/T2

Boyle's law :  The pressure and volume of a gas show a _____ relationship. 

• Inverse 
• Direct 

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

PV=nRT

• Charles Law
• Boyle's Law
• Combined Gas Law
• Ideal Gas Law

How many moles of propane gas are in a 7.0 L tank at 20°C and 5.45atm of pressure?

• 0.629 mol

• 1.59 mol

• 23.2 mol

• 917 mol

A balloon contains 0.504 moles of a gas at a volume of 2680 mL.  When the number of moles changes to 0.423 moles, what is the new volume of the balloon?

Enter your answer with the correct number of significant figures.

• 2.25L

• 7.9 mL

• 571 mL

• 3.19 L

According to kinetic molecular model, in gases,

• The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern

• The particles occur in clusters with molecules slightly further apart

• The molecules are very far apart and occupy all space made available to them

• The particles vibrate about fixed positions and are held together by strong intermolecular bonds between them

Which two variables have a direct relationship Charles' Law?

• Pressure and Volume

• Pressure and Temperature

• Volume and Temperature

• Volume and Moles

What is the formula for Charles' Law?

• P1V1 = P2V2

• P1V2 = P2V1

• V1T1 = V2T2

• V1T2 = V2T1

A balloon had an original volume of 12.05 L. Additional gas was added to the balloon. The new volume is 12.99 L when a total of 7.81 moles of gas are in the balloon. How many moles did the balloon originally contain?

• 20.04 mol

• 7.24 mol

• 1.53 mol

• 7.00 mol