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 = 2.5 molV = 25 LT = 150 °CP = ?

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

n = 2.5 molV = 25 LT = 150 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 5 molV = 40 LT = 65 °CP = ?

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

n = 5 molV = 40 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
220 g of CH₄P = 500 kPaT = 25 °CV = ?

What volume V does 220 g of CH₄ occupy at 500 kPa and 25 °C? Treat it as an ideal gas.

m = 220 gM = 16.04 g/molP = 500 kPaT = 25 °CR = 8.314 J/(mol·K)
V = L
4.Medium
280 g of O₂P = 500 kPaT = 50 °CV = ?

What volume V does 280 g of O₂ occupy at 500 kPa and 50 °C? Treat it as an ideal gas.

m = 280 gM = 32 g/molP = 500 kPaT = 50 °CR = 8.314 J/(mol·K)
V = L
5.Hard
N₂, M = 28.01 g/molP = 750 kPaT = 0 °Cρ = ?

Find the density ρ of N₂ at 750 kPa and 0 °C, treating it as an ideal gas.

M = 28.01 g/molP = 750 kPaT = 0 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
He, M = 4.003 g/molP = 850 kPaT = 170 °Cρ = ?

Find the density ρ of He at 850 kPa and 170 °C, treating it as an ideal gas.

M = 4.003 g/molP = 850 kPaT = 170 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 351.8 kPa
  2. 2. P = 351.4 kPa
  3. 3. V = 68 L
  4. 4. V = 47.02 L
  5. 5. ρ = 9.25 kg/m³
  6. 6. ρ = 0.9235 kg/m³

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