DOL: Ideal Gas Law

How do you know which to use for a problem?

• The units for pressure

• The units for temperature

• The units of volume

• The amount of moles

In the following, what will be the value for R:

What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?

• 0.0821 L⋅atm∕mol⋅K

• 8.314 L⋅kPa∕mol⋅K

• 293 K

• 1.2 atm

In the following, what will be the value for R:

How many moles of propane gas are in a 7.0 L tank at 20°C and 54.5 KPa of pressure?

• 0.0821 L⋅atm∕mol⋅K

• 8.314 L⋅kPa∕mol⋅K

• 293 K

• 1.2 atm

Choose the correct set of variables to solve the following problem:

What pressure, in kPa, is required to contain 0.23 moles of nitrogen gas in a 4.2 L container at a temperature of 20⁰C?

• P = x (unknown), V = 4.2 L, n = 0.23 mol, R = 8.314 L·kPa/mol·K, T = 20⁰C

• P = x (unknown), V = 4.2 L, n = 0.23 mol, R = 0.0821 L·atm/mol·K, T = 20⁰C

• P = x (unknown), V = 4.2 L, n = 0.23 mol, R = 0.0821 L·atm/mol·K, T = 293 K

• P = x (unknown), V = 4.2 L, n = 0.23 mol, R = 8.314 L·kPa/mol·K, T = 293 K

What is the pressure in KPa exerted by 5.00 moles of nitrogen gas contained in a 30.0 Liter container at 25.0 °C?

• 413 KPa

• 34.6 KPa

• 4.08 kPa

• 0.342kPa