4th Unit Test in Science 10

What do you expect to happen to the volume of a gas if its pressure is doubled and its temperature is reduced to half?

• its volume is increased

• its volume is doubled

• its volume remains unchanged

• its volume is decreased

A 5.00-liter oxygen gas exerts a pressure of 1.00 atmosphere. How much pressure is needed for this gas to be compressed in a 2.00-liter cylinder, provided there is no temperature change?

• 3.0 atm

• 2.5 atm

• 2.0 atm

• 1.5 atm

A 125-liter gas exerts a pressure of 800 torr. What is the new volume if the pressure is increased to 1200 torr at constant temperature?

• 83 L

• 187 L

• 33 L

• 8.3 L

If you blow up a balloon, tie it securely and put it in a freezer. Which is most likely to happen?

• It will increase in volume

• It will decrease in volume

• It will be deflated

• Nothing will happen to it

Suppose P, V, and T represent the gas’s pressure, volume, and temperature, then the correct representation of Boyle’s law is

• V is inversely proportional to T (at constant P)

• V inversely proportional to P (at constant T)

• PV = nRT

• PV = RT

A sample of hydrogen has a volume of 25 L under a pressure of 5 atm. What would be the pressure of this gas be if the volume were decreased to 5 L?

• 25 atm

• 15 atm

• 10 atm

• 5 atm

What does Boyle's law describe?

• The inverse relationship between pressure and volume of a gas at constant temperature.

• The direct relationship between pressure and temperature of a gas at constant volume.

• The relationship between volume and the number of molecules of a gas at constant pressure.

• The relationship between temperature and volume of a gas at constant pressure.

At constant temperature, if the pressure of a gas is increased, what happens to its volume according to Boyle's law?

• It remains constant.

• It may change or not, depending on other factors.

• It decreases

• It increases.

What is the practical application of Boyle's law?

• Writing

• Breathing

• Reading

• Walking

What is the standard unit of pressure used in Boyle's law calculations?

• Joule

• Pascal

• Meter

• Watt