L2-2: Boyle's Law Quiz

Which of the following is NOT a use of gas laws?

• Predicting the behavior of gases

• Describing the behavior of gases

• Calculating the mass of solids

• Understanding conditions of temperature, pressure, and volume

Answer explanation

Gas laws are used to predict, describe, and understand the behavior of gases under various conditions. They do not apply to calculating the mass of solids, making 'Calculating the mass of solids' the correct choice.

Which of the following is true according to Boyle's Law?

• Pressure and volume are directly proportional.

• Pressure and volume are inversely proportional.

• Pressure and volume are unrelated.

• Pressure and volume are equal.

Answer explanation

According to Boyle's Law, pressure and volume are inversely proportional, meaning that as one increases, the other decreases, provided the temperature remains constant.

In Boyle's Law, if the volume of a gas decreases, what happens to the pressure?

• It decreases.

• It increases.

• It remains constant.

• It becomes zero.

Answer explanation

According to Boyle's Law, pressure and volume are inversely related. When the volume of a gas decreases, the pressure increases, as the gas molecules are compressed into a smaller space, leading to more collisions and higher pressure.

• It is variable.

• It is constant.

• It is zero.

• It is infinite.

What happens to the volume of air inside a balloon when it is squeezed?

• It increases

• It decreases

• It remains the same

• It doubles

Answer explanation

When a balloon is squeezed, the air inside is compressed, leading to a decrease in volume. Therefore, the correct answer is that the volume of air inside the balloon decreases.

What does the symbol 'α' represent in the context of Boyle's Law?

• Equals

• Proportional to

• Greater than

• Less than

Answer explanation

In Boyle's Law, the symbol 'α' indicates that the pressure of a gas is inversely proportional to its volume at constant temperature. Thus, 'α' represents 'proportional to', highlighting the relationship between these two variables.

A fixed amount of a gas occupies a volume of 1L and exerts a pressure of 450 kPa on the walls of its container. How much pressure would the gas apply if it were transferred into a new three-liter container?

(Presuming that the gas's temperature and the amount of gas stay the same.)

• 35 psi

• 50 psi

• 150 psi

• 100 psi

Answer explanation

The final pressure (P2) is calculated based on the given conditions and parameters. The correct answer is 70 psi, as it aligns with the calculations performed in the problem.

What happens to the pressure when the volume is halved, according to Boyle's Law?

• Pressure doubles

• Pressure halves

• Pressure remains the same

• Pressure quadruples

Answer explanation

According to Boyle's Law, pressure and volume are inversely related. If the volume is halved, the pressure must double to maintain the constant product of pressure and volume. Therefore, the correct answer is 'Pressure doubles'.

If the initial pressure is 35 psi and the final pressure is 70 psi, what can be inferred about the volume change?

• Volume doubled

• Volume halved

• Volume remained the same

• Volume tripled

Answer explanation

According to Boyle's Law, pressure and volume are inversely related. If the pressure doubles from 35 psi to 70 psi, the volume must halve to maintain the relationship, confirming that the volume is halved.

What happens to the pressure if the volume of a gas is reduced to half its original size, assuming temperature remains constant?

• It doubles

• It halves

• It remains the same

• It triples

Answer explanation

According to Boyle's Law, if the temperature is constant, pressure and volume are inversely related. Reducing the volume to half increases the pressure to double its original value.