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 = 4 molV = 50 LT = 90 °CP = ?

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

n = 4 molV = 50 LT = 90 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 40 LT = 95 °CP = ?

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

n = 0.5 molV = 40 LT = 95 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
350 g of HeP = 200 kPaT = 75 °CV = ?

What volume V does 350 g of He occupy at 200 kPa and 75 °C? Treat it as an ideal gas.

m = 350 gM = 4.003 g/molP = 200 kPaT = 75 °CR = 8.314 J/(mol·K)
V = L
4.Medium
30 g of O₂P = 300 kPaT = 75 °CV = ?

What volume V does 30 g of O₂ occupy at 300 kPa and 75 °C? Treat it as an ideal gas.

m = 30 gM = 32 g/molP = 300 kPaT = 75 °CR = 8.314 J/(mol·K)
V = L
5.Hard
O₂, M = 32 g/molP = 450 kPaT = 60 °Cρ = ?

Find the density ρ of O₂ at 450 kPa and 60 °C, treating it as an ideal gas.

M = 32 g/molP = 450 kPaT = 60 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
O₂, M = 32 g/molP = 900 kPaT = 90 °Cρ = ?

Find the density ρ of O₂ at 900 kPa and 90 °C, treating it as an ideal gas.

M = 32 g/molP = 900 kPaT = 90 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 241.5 kPa
  2. 2. P = 38.26 kPa
  3. 3. V = 1265 L
  4. 4. V = 9.045 L
  5. 5. ρ = 5.199 kg/m³
  6. 6. ρ = 9.539 kg/m³

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