Unit 10 - Gas Laws

Content Questions

100

Avogadro's Law states that moles and volume are [directly / inversely] related in ideal gases.

Directly Related

200

True or False:  According to Kinetic Molecular Theory, all gases are Ideal Gases.

False.

300

According to Collision Theory, for a successful reaction, particles must collide, have enough energy, and have proper ___________.

Orientation

400

Which of the following is NOT a point of Kinetic Molecular Theory?

I - The volume of the individual atom is negligible to the volume of the gas.

II - All collisions in a gas are inelastic.

III - Kinetic Energy is directly related to Temperature.

II - the opposite is true! In Kinetic Molecular Theory we consider all collisions to be elastic.

500

What is the difference between Diffusion and Effusion? 

Diffusion - Dispersing, gas spreading out throughout a room

Effusion - Escaping Gas, gas leaking out through a small hole

Name That Law

100

P₁V₁ = P₂V₂

Boyle's Law

200

PV = nRT

Ideal Gas Law

300

In what law is pressure considered to be constant?

Charles' Law

400

Which gas law relates pressure, temperature, and volume?

The Combined Gas Law and Ideal Gas Law

500

If you are given the volume, pressure, and temperature of a gas. Using the ideal gas law, what else are you able to calculate?

Number of Moles

Conversions

100

Convert 25'C to Kelvin.

298.15 K

200

Convert 330K to degrees Celsius.

56.85'C

300

Convert 2.5 atm to psi.

36.75 psi

400

Convert 1100 mmHg to kPa.

146.62 kPa

500

What is STP in mmHg and degrees Celsius?

760 mmHg and 0'C

Initial vs. Final

100

Given the initial pressure of 5 atm and initial volume of 10 liters, what would the final pressure be if the volume was quadrupled?

1.25 atm

P₁V₁ = P₂V₂

200

I blow up a balloon to 14.1 liters, the air from my lungs is 35'C. The balloon sits in my house and cools down to 20'C, what is the new volume of the balloon?

13.41 Liters

(Charles' Law)

300

What variable is considered constant in the Combined Gas Law?

Number of Moles

400

A free diver is sitting at the surface of a lake, the pressure on their lungs in 1 atm and their lung capacity is 6 liters. The free diver descends 18 meters where the pressure on their lungs is now 1.74 atm. What is their new lung capacity at this depth?

3.45 liters

(This is less than 2/3s the volume of their normal lung capacity!)

500

A 6 L sample of krypton is held at STP. What volume does the gas occupy when the pressure is tripled and the temperature is doubled?

4.00 Liters

Ideal Gas Law

100

What are the conditions for STP?

1 atm and 273.15 K

200

What is the value of R including units?

0.0821 L x atm / K x mol

300

If you are given the pressure, temperature, and number of moles, what unknown variable are you able to calculate using the Ideal Gas Law?

Volume

400

What is the volume of 1 mole of an unknown gas at STP?

22.4 L

500

How many grams of helium are present in a canister with a volume of 5 L, pressure of 2.5 atm, and temperature of 22'C?

2.06 g He