Commbined Gas Law for COT

1.     Which of the following phenomena does NOT involve the application of gas pressure?      

• A. burning fuels

• B. vulcanizing tire

• C. falling leaves

• D. rising hot air balloons

How does the temperature affect the average kinetic energy of gas

molecules?

• A.     as the temperature decreases the average kinetic energy of gas molecules decreases.

• B.     as the temperature decreases the average kinetic energy of gas molecules increases.

• C.    as the temperature decreases the average kinetic energy of gas molecules remains the same.

• D.    as the temperature decreases the average kinetic energy of gas molecules fluctuates.

Records show that the incident of tire explosion is high during summer season. Which of the following gives the best explanation for this observation?

• A.     there are more travelers during summer vacation

• B.     high temperature during summer season causes the air inside the tire to expand

• C.    vehicles’ tires are not well maintained

• D.    there is too much air inside the tires

A sample of carbon dioxide occupies 3 L at 35ºC and 1 atm. What will happen to its volume if its condition is changed to 48ºC and 1.5 atm?

• A. The volume will decrease.

• B. The volume will increase.

• C. The volume will remain the same.

•  D. The volume cannot be determined.

Which of the following equation is correct in solving the final pressure in combined gas law?

• A. P₂ = P₁V₁T₂

                V₂T₁

• B. P₂ = P₁V₂T₂

               V1T1

• C. P₂ = P₁V₁T₁

                V₂T₂

According to the combined gas law, which of the following statement is INCORRECT?

• A.     Pressure is directly proportional to temperature.

• B.     Pressure is directly proportional to volume.

• C.    Volume is directly proportional to temperature.

Which of the following statements correctly defines the combined gas law?

• A.     It gives the relationship between volume and pressure of a gas.

• B.     It gives the relationship between volume and temperature of a gas.

• C.    It gives the relationship of the volume, temperature and pressure of a gas.

Helium gas has a volume of 250 mL at 0°C at 1.0 atm. What will be the final pressure if the volume is reduced to 100 mL at 45°C?