Boyle's Law Pop Quiz

When Pressure increases then the Volume must...

• Increase

• decrease

Answer explanation

According to Boyle's Law, when pressure increases, the volume of a gas decreases, provided the temperature remains constant. Therefore, the correct answer is that the volume must decrease.

When Volume increases then Pressure must...

• Increase

• Decrease

Answer explanation

According to Boyle's Law, when the volume of a gas increases, the pressure decreases, provided the temperature remains constant. Therefore, when volume increases, pressure must decrease.

What is the new volume of the gas if the pressure on 350.0 L of oxygen at 720.0 mm Hg is decreased to 600.0 mm Hg? Report your answer to ONE DECIMAL.

My answer is _ L. (one decimal)

(a)  

Answer explanation

Using Boyle's Law (P1V1 = P2V2), we can calculate the new volume. With P1 = 720 mm Hg, V1 = 350 L, and P2 = 600 mm Hg, we find V2 = (P1V1)/P2 = (720 * 350) / 600 = 420.0 L. Thus, the new volume is 420.0 L.

Which container will have a lower pressure?

• left

• right

• they both have the same pressure

• I don't know

Answer explanation

The left container has a lower pressure because it likely contains a smaller volume of gas or a higher volume of liquid compared to the right container, leading to reduced pressure according to the ideal gas law.

Tags

NGSS.MS-PS1-4

Sketch the graph of the relationship of Volume and Pressure.

Answer explanation

Should resemble the graph shown.

This graph is an example of two variables that are:

• directly proportional

• inversely proportional

• Straight line

• No relation

Answer explanation

The graph shows that as one variable increases, the other decreases, indicating an inverse relationship. This is characteristic of inversely proportional variables, where their product remains constant.

Explain why, as temperature is held constant, that as volume decreases pressure will increase.

Answer explanation

According to Boyle's Law, at constant temperature, pressure and volume are inversely related. As volume decreases, the same amount of gas molecules occupies a smaller space, leading to more frequent collisions with the walls, thus increasing pressure.

Convert 1 Degree Celsius to Kelvin:

• 274.15 K

• - 283.15 K

• 0 K

• 373 K

Answer explanation

To convert Celsius to Kelvin, use the formula K = °C + 273.15. Therefore, 1 °C + 273.15 = 274.15 K, making 274.15 K the correct answer.

Convert 0 Kelvin to Degrees Celsius:

• - 273.15 ^oC

• - 273 K

• 273.15 ^oC

• 273 K

Answer explanation

To convert Kelvin to Celsius, subtract 273.15. Therefore, 0 K equals -273.15 °C, making the correct answer -273.15 °C.

Boyle's law states that the pressure and volume of a gas show a (a)   relationship. 

• Inverse 
• Direct