Ideal gas law worksheet with answers

Free printable Ideal gas law worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy
n = 3 molV = 25 LT = 25 °CP = ?

A rigid tank holds an ideal gas. Find its pressure P.

n = 3 molV = 25 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 15 LT = 90 °CP = ?

A rigid tank holds an ideal gas. Find its pressure P.

n = 0.5 molV = 15 LT = 90 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
360 g of HeV = 10 LT = 10 °CP = ?

A tank of 10 L contains 360 g of He at 10 °C. Treat it as an ideal gas and find the pressure P.

m = 360 gM = 4.003 g/molV = 10 LT = 10 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
400 g of CO₂V = 50 LT = 5 °CP = ?

A tank of 50 L contains 400 g of CO₂ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 400 gM = 44.01 g/molV = 50 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
CO₂, M = 44.01 g/molP = 300 kPaT = 130 °Cρ = ?

Find the density ρ of CO₂ at 300 kPa and 130 °C, treating it as an ideal gas.

M = 44.01 g/molP = 300 kPaT = 130 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
CH₄, M = 16.04 g/molP = 300 kPaT = 120 °Cρ = ?

Find the density ρ of CH₄ at 300 kPa and 120 °C, treating it as an ideal gas.

M = 16.04 g/molP = 300 kPaT = 120 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 297.5 kPa
  2. 2. P = 100.6 kPa
  3. 3. P = 21171 kPa
  4. 4. P = 420.4 kPa
  5. 5. ρ = 3.939 kg/m³
  6. 6. ρ = 1.472 kg/m³

Full step-by-step solutions: practise this topic on examproblems.com.