Understanding the Combined Gas Law

What is the equation for the Combined Gas Law?

• P1 * V1 = P2 * V2

• P1 * V1 / T1 = P2 * V2 / T2

• V1 / T1 = V2 / T2

• P1 / T1 = P2 / T2

Why is it important to use Kelvin in gas law calculations?

• Kelvin is a larger unit than Celsius.

• Kelvin is the standard unit for pressure.

• Kelvin is easier to calculate with.

• Using Kelvin prevents division by zero.

What happens to the Combined Gas Law equation if temperature is constant?

• It remains unchanged.

• It becomes Gay-Lussac's Law.

• It becomes Charles' Law.

• It becomes Boyle's Law.

What does STP stand for in gas law problems?

• Standard Temperature and Power

• Standard Time and Pressure

• Standard Time and Power

• Standard Temperature and Pressure

When should you use the Combined Gas Law?

• When only pressure changes.

• When only volume changes.

• When pressure, volume, or temperature changes.

• When no variables change.

In the example with methane, what was the initial volume?

• 3.8 L

• 4.9 L

• 5.0 L

• 3.5 L

In the methane example, what was the final temperature in Kelvin?

• 278 K

• 359 K

• 273 K

• 300 K

In the dyboron gas example, what was the initial pressure?

• 345 to

• 468 to

• 300 to

• 400 to

In the dyboron gas example, what was the final volume?

• 3.00 L

• 4.00 L

• 3.48 L

• 3.07 L

In the final example, what was the new pressure at 100°C?

• 25 atmospheres

• 17 atmospheres

• 20.8 atmospheres

• 15 atmospheres