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 = 5 LT = 15 °CP = ?

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

n = 1 molV = 5 LT = 15 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 20 LT = 10 °CP = ?

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

n = 0.5 molV = 20 LT = 10 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
50 g of CH₄V = 20 LT = 5 °CP = ?

A tank of 20 L contains 50 g of CH₄ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 50 gM = 16.04 g/molV = 20 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
70 g of ArV = 20 LT = 75 °CP = ?

A tank of 20 L contains 70 g of Ar at 75 °C. Treat it as an ideal gas and find the pressure P.

m = 70 gM = 39.95 g/molV = 20 LT = 75 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
Ar, M = 39.95 g/molP = 350 kPaT = 150 °Cρ = ?

Find the density ρ of Ar at 350 kPa and 150 °C, treating it as an ideal gas.

M = 39.95 g/molP = 350 kPaT = 150 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of Ar goes from 250 kPa, 5 L, 30 °C to 650 kPa and 70 °C. Find the new volume V2.

P1 = 250 kPaV1 = 5 LT1 = 30 °CP2 = 650 kPaT2 = 70 °C
V2 = L

Answer key

  1. 1. P = 479.1 kPa
  2. 2. P = 58.85 kPa
  3. 3. P = 360.4 kPa
  4. 4. P = 253.6 kPa
  5. 5. ρ = 3.974 kg/m³
  6. 6. V2 = 2.177 L

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