Free Printable Gas laws

1.

Aria, Mia, and David are conducting an experiment in their science class. They noticed that the balloon they filled with helium is lighter than the one filled with air. This is because helium is a gas and gases generally have

a)

low density

b)

high density

c)

closely packed particles

d)

no increase in volume when temperature is increased

e)

no decrease in volume when pressure is increased

2.

Isla, James, and Liam are studying physics. They are discussing about pressure. James says that pressure is

a)

defined as the mass that an object exerts when at rest

b)

measured in Newtons

c)

defined as the number of moles of substance divided by the mass of the substance

d)

defined as the force per unit area

e)

measured in grams

3.

Lily, Hannah, and Ethan are conducting an experiment in their chemistry class. They observe that:

a)

Equal amounts of gases occupy the same volume in their balloons at constant temperature and pressure.

b)

The volume of a fixed amount of gas in Ethan's balloon is inversely proportional to its pressure at constant temperature.

c)

The volume of a fixed amount of gas in Hannah's balloon is directly proportional to its temperature in Kelvin at constant pressure.

d)

The total pressure of a mixture of gases in Lily's balloon is the simple sum of the partial pressure of all of the gaseous compounds.

e)

The rates of effusion of gases from their balloons are inversely proportional to the square roots of their molar masses.

4.

Scarlett, Jackson, and Evelyn are conducting a science experiment in their chemistry class. They are studying Avogadro's law. According to this law:

a)

Equal amounts of gases, like the ones Scarlett, Jackson, and Evelyn are using, will occupy the same volume at constant temperature and pressure.

b)

The volume of a fixed amount of gas, like the one in their experiment, is inversely proportional to its pressure at constant temperature.

c)

The volume of a fixed amount of gas, like the one in their experiment, is directly proportional to its temperature in Kelvin at constant pressure.

d)

The total pressure of a mixture of gases, like the one they are creating, is the simple sum of the partial pressure of all of the gaseous compounds.

e)

The rates of effusion of gases, like the ones they are studying, are inversely proportional to the square roots of their molar masses.

5.

During a science experiment, Mia, David, and Benjamin observed that when they heated a fixed amount of gas at constant pressure, its volume changed. This observation is best explained by which of the following laws?

a)

Equal amounts of gases occupy the same volume at constant temperature and pressure.

b)

The volume of a fixed amount of gas is inversely proportional to its pressure at constant temperature.

c)

The volume of a fixed amount of gas is directly proportional to its temperature in Kelvin at constant pressure.

d)

The total pressure of a mixture of gases is the simple sum of the partial pressure of all of the gaseous compounds.

e)

The rates of effusion of gases are inversely proportional to the square roots of their molar masses.

6.

Aria, Ethan, and Abigail are conducting an experiment with a sample of helium gas in a container fitted with a piston. The piston is frictionless, but has a mass of 10.0 kg. They are trying to figure out which of the following processes will cause the piston to move away from the base and decrease the pressure of the gas, assuming ideal behavior.

I. Heating the helium

II. Removing some of the helium from the container

III. Cooling the gas in the container

IV. Decreasing the pressure outside the container

a)

only I

b)

I and IV

c)

IV only

d)

II and III

e)

I and III

7.

Grace, Priya, and Benjamin are conducting a science experiment in their school lab. They have a gas sample which they are holding at constant pressure. Initially, the gas occupies 3.62 L of volume when the temperature is 294.8 K. They are trying to determine the temperature at which the volume of the gas would be 3.42 L. Can you help them find out?

a)

312K

b)

278.5K

c)

20.4K

d)

295K

e)

552K

8.

Benjamin, Arjun, and Emma are each holding four identical balloons filled with 10.0 g of a different gas. Benjamin's balloon is filled with H₂, Arjun's with He, Emma's with Ne, and the fourth balloon is filled with O₂. Considering the molar mass (g/mol): H₂ 2.02, He 4.00, Ne 20.18, O₂ 32.00, whose balloon is the largest?

a)

Benjamin's (H₂)

b)

Arjun's (He)

c)

Emma's (Ne)

d)

The one with O₂

e)

All have the same volume.

9.

Ethan is working in a chemical lab and he has a 25.0 L tank of NH₃ at $190\degree C$ and 5.20 atm. He wants to know how many moles of NH₃ are contained in the tank?

He remembers the Ideal gas equation is: PV = nRT

$R=0.08206\ \frac{L.atm}{mol\cdot K}$ $0\ \degree C\ =\ 273.15\ K$

a)

$\frac{\left(0.08206\ \frac{L.atm}{mol\cdot K}\right)\left(463.15\ K\right)}{\left(5.20\ atm\right)\left(25.0\ L\right)}$

= 0.293 moles NH₃

b)

Not enough information given.

c)

$\frac{\left(5.20\ atm\right)\left(25.0\ L\right)}{\left(0.08206\ \frac{L.atm}{mol\cdot K}\right)\left(190\degree C\right)}\$ = 8.34 moles of NH₃

d)

$\frac{\left(5.20\ atm\right)\left(25.0\ L\right)}{\left(0.08206\ \frac{L.atm}{mol\cdot K}\right)\left(463.15K\right)}$

= 3.42 moles of NH₃

10.

Match the following gas laws with corresponding mathematical relationship:

a)

Boyle's Law

1.

P₁V₁ = P₂V₂

(n & T are constant)

b)

Charles' Law

2.

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

(n & P are constant)

c)

Avogadro's Law

3.

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$

(p and T are constant)

d)

Graham's Law of Diffusion (or Effusion)

4.

$\frac{rate_1}{rate_2}=\sqrt[]{\frac{M_2}{M_1}}$

(M1 & M2 are the molar masses of gases)

e)

Ideal Gas Law

5.

PV = nRT

Gas laws

Total questions: 10

Worksheet time: 9mins

Similar Resources on Wayground