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 = 1 molV = 15 LT = 15 °CP = ?

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

n = 1 molV = 15 LT = 15 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 3 molV = 10 LT = 45 °CP = ?

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

n = 3 molV = 10 LT = 45 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
210 g of CH₄P = 200 kPaT = 30 °CV = ?

What volume V does 210 g of CH₄ occupy at 200 kPa and 30 °C? Treat it as an ideal gas.

m = 210 gM = 16.04 g/molP = 200 kPaT = 30 °CR = 8.314 J/(mol·K)
V = L
4.Medium
440 g of CH₄P = 200 kPaT = 70 °CV = ?

What volume V does 440 g of CH₄ occupy at 200 kPa and 70 °C? Treat it as an ideal gas.

m = 440 gM = 16.04 g/molP = 200 kPaT = 70 °CR = 8.314 J/(mol·K)
V = L
5.Hard
He, M = 4.003 g/molP = 250 kPaT = 70 °Cρ = ?

Find the density ρ of He at 250 kPa and 70 °C, treating it as an ideal gas.

M = 4.003 g/molP = 250 kPaT = 70 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
He, M = 4.003 g/molP = 1000 kPaT = 90 °Cρ = ?

Find the density ρ of He at 1000 kPa and 90 °C, treating it as an ideal gas.

M = 4.003 g/molP = 1000 kPaT = 90 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 159.7 kPa
  2. 2. P = 793.5 kPa
  3. 3. V = 165 L
  4. 4. V = 391.3 L
  5. 5. ρ = 0.3508 kg/m³
  6. 6. ρ = 1.326 kg/m³

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