# Boyle’s Law

Boyle’s Law.

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In Experiment 1, what volume did the propane gas occupy in the Erlenmeyer flask before the addition of any water?

Select one:

a. 20 mL

b. 314 mL

c. 0.0 mL

d. 250 mL

In Experiment 1, what was the pressure of the propane gas in the Erlenmeyer flask before the addition of any water?

Select one:

a. 1.15 atm

b. 1.00 atm

c. 3.00 atm

d. 0.00 atm

In Experiment 1, what was the pressure of the propane gas in the Erlenmeyer flask after the addition of 20 mL of water?

Select one:

a. 1.068 atm

b. 1.467 atm

c. 2.14 atm

d. 1.00 atm

In Experiment 1, what volume did the propane gas occupy after the addition of 40 mL of water?

Select one:

a. 190 mL

b. 274 mL

c. 210 mL

d. 40 mL

In Experiment 1, what volume did the propane gas occupy after the addition of 80 mL of water?

Select one:

a. 170 mL

b. 234 mL

c. 0 mL

d. 80 mL

In Experiment 1, what is the relationship between the volume occupied by propane and its pressure?

Select one:

a. As the volume of propane decreased, the pressure was constant.

b. As the volume of propane increased, the pressure increased.

c. As the volume of propane decreased, the pressure increased.

d. As the volume of propane decreased, the pressure decreased.

In Experiment 2, what was the pressure of the butane gas in the Erlenmeyer flask before the addition of any water?

Select one:

a. 1.00 atm

b. 1.15 atm

c. 3.00 atm

d. 0.00 atm

In Experiment 2, what was the pressure of the butane gas in the Erlenmeyer flask after the addition of 40 mL of water?

Select one:

a. 1.146 atm

b. 1.00 atm

c. 1.068 atm

d. 2.14 atm

In Experiment 2, what volume did the butane gas occupy after the addition of 20 mL of water?

Select one:

a. 150 mL

b. 230 mL

c. 294 mL

d. 110 mL

In Experiment 2, what volume did the butane gas occupy after the addition of 60 mL of water?

Select one:

a. 190 mL

b. 254 mL

c. 70 mL

d. 150 mL

In both experiments, what accounts for the change in pressure you observed as you changed the volume of the gas?

Select one:

a. When a gas is in a larger volume, the molecules have more space and bump into the walls of the flask more, thereby exerting a greater pressure.

b. When a gas is in a smaller volume, the molecules are more confined and bump into the walls of the flask more, thereby exerting a greater pressure.

c. The volume of the gas does not account for the changes in the pressure.

d. When a gas is in a smaller volume, the molecules have more space in the flask, thereby exerting a smaller pressure.

How did your data collected in Experiment 1 with propane gas compare to the data you collected in Experiment 2 using butane?

Select one:

a. The pressure values from propane gas were lower than for butane gas.

b. The two experiments produced very different data.

c. Both experiments produced the same data.

d. The pressure values from propane gas were higher than for butane gas.

What can you conclude based on the data that you collected from Experiments 1 and 2?

Select one:

a. Gases behave similarly with respect to pressure and volume regardless of the identity of the gas.

b. Gases behave similarly with respect to pressure but not with respect to volume regardless of the identity of the gas.

c. Gases behave differently with respect to pressure and volume regardless of the identity of the gas.

d. Gases behave differently with respect to pressure and volume depending on the identity of the gas.

Suppose you conducted a similar experiment using helium gas. Given that helium is much lighter than the gases used in this lab,

what would you expect the relationship between the volume of helium and the pressure to be?

Select one:

a. periodic, because helium is lighter

b. exponential, because helium is lighter

c. inversely proportional, just like for propane and butane

d. directly proportional, just like for propane and butane

What are the four variables that can be altered in a gas sample?

Select one:

a. volume, density, velocity, and temperature

b. volume, pressure, temperature, and amount

c. effusion, pressure, number of moles, and diffusion

d. speed, volume, temperature, and number of moles

What are the variables that Robert Boyle held constant during his experiments on gases?

Select one:

a. volume and pressure

b. temperature and amount

c. amount and pressure

d. volume and temperature

What is the mathematical equation that represents Boyle’s Law?

Select one:

a. PV=nRT

b. P/V=constant

c. constant×P×V=R×T

d. P×V=constant

In a classroom laboratory, what will be the initial change in the gas variables when the volume is decreased?

Select one:

a. The pressure will increase.

b. The temperature will decrease.

c. The pressure and temperature will increase.

d. The amount and temperature will increase.

Deep water fish such as the ones in the figure below are highly sought after for home aquariums. However, these fish are hard to transport to the surface safely. Why do you think that is?

Select one:

a. As the water pressure decreases, there is not enough oxygen for the fish in the water.

b. As the water pressure increases, the air in their swim bladders compresses until they burst.

c. As the water pressure decreases, the air in their swim bladders compresses until they burst.

d. As the water pressure decreases, the air in their swim bladders expands until they burst.

Boyle’s Law

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