Gas Laws

What is the correct temperature on the Kelvin scale equal to 30^oC?

• 303K
• 243K
• 313K
• 253K

If the pressure of a gas starts out at 200 kPa and increases to 600kPa, what would the initial temperature be if it ended up at 300K?

[P₁V₁ / T₁ = P₂V₂ / T₂]

• 50K

• 200K

• 400K

• 100K

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

Tags

NGSS.HS-PS1-5

In the ideal gas law, which variable represents the gas constant?

• n
• R
• T
• V

Calculate the volume that a 0.323 mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

Remember: PV = nRT; R = 0.082 atm⋅L/mol⋅K and 8.314 kPa⋅L/mol⋅K

• 7.18 L

• 7.81 L

• 4.63 L

• 4.36 L

You have a gas that has a pressure of 2 atm and a volume of 10 L. What would be the new volume if the pressure was changed to 1 atm?

[P₁V₁ / T₁ = P₂V₂ / T₂]

• 5 L

• 20 L

• It would stay at 10L

• 1 L

A sample of gas with a volume of 30.0 mL at 25.0^oC is heated to 50.0^oC. What is the new volume of the gas?

[P₁V₁ / T₁ = P₂V₂ / T₂]

• 60.0 mL

• 15.0 mL

• 27.5 mL

• 32.5 mL

Determine the number of moles in a container of gas at a temperature of 273 K and a pressure of 1 atm with a volume of 99.2 L.

Remember: PV = nRT; R = 0.082 atm⋅L/mol⋅K and 8.314 kPa⋅L/mol⋅K

• 2222.08 moles

• 4.43 moles

• 22.4 moles

• 76.8 moles

If a gas is measured to have a volume of 0.5 atm at 273 K, what would happen to the pressure if the temp increased to 300 K?

[P₁V₁ / T₁ = P₂V₂ / T₂]

• increase

• decrease

• remain the same

A balloon is filled with 1.9 moles of helium at 45°C. What would happen to the pressure in the balloon if 0.2 moles of He are removed at the same pressure?

• increase

• decrease

• remain the same