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 molV = 20 LT = 65 °CP = ?

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

n = 2 molV = 20 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 4 molV = 50 LT = 110 °CP = ?

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

n = 4 molV = 50 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
290 g of O₂P = 200 kPaT = 25 °CV = ?

What volume V does 290 g of O₂ occupy at 200 kPa and 25 °C? Treat it as an ideal gas.

m = 290 gM = 32 g/molP = 200 kPaT = 25 °CR = 8.314 J/(mol·K)
V = L
4.Medium
410 g of O₂V = 20 LT = 5 °CP = ?

A tank of 20 L contains 410 g of O₂ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 410 gM = 32 g/molV = 20 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
CO₂, M = 44.01 g/molP = 300 kPaT = 70 °Cρ = ?

Find the density ρ of CO₂ at 300 kPa and 70 °C, treating it as an ideal gas.

M = 44.01 g/molP = 300 kPaT = 70 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of He goes from 150 kPa, 20 L, 25 °C to 200 kPa and 250 °C. Find the new volume V2.

P1 = 150 kPaV1 = 20 LT1 = 25 °CP2 = 200 kPaT2 = 250 °C
V2 = L

Answer key

  1. 1. P = 281.1 kPa
  2. 2. P = 254.8 kPa
  3. 3. V = 112.3 L
  4. 4. P = 1481 kPa
  5. 5. ρ = 4.628 kg/m³
  6. 6. V2 = 26.32 L

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