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.

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1.Easy
n = 1 molV = 5 LT = 115 °CP = ?

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

n = 1 molV = 5 LT = 115 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 20 LT = 135 °CP = ?

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

n = 0.5 molV = 20 LT = 135 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
40 g of ArP = 100 kPaT = 0 °CV = ?

What volume V does 40 g of Ar occupy at 100 kPa and 0 °C? Treat it as an ideal gas.

m = 40 gM = 39.95 g/molP = 100 kPaT = 0 °CR = 8.314 J/(mol·K)
V = L
4.Medium
430 g of N₂P = 750 kPaT = 45 °CV = ?

What volume V does 430 g of N₂ occupy at 750 kPa and 45 °C? Treat it as an ideal gas.

m = 430 gM = 28.01 g/molP = 750 kPaT = 45 °CR = 8.314 J/(mol·K)
V = L
5.Hard
CH₄, M = 16.04 g/molP = 600 kPaT = 190 °Cρ = ?

Find the density ρ of CH₄ at 600 kPa and 190 °C, treating it as an ideal gas.

M = 16.04 g/molP = 600 kPaT = 190 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
CO₂, M = 44.01 g/molP = 150 kPaT = 180 °Cρ = ?

Find the density ρ of CO₂ at 150 kPa and 180 °C, treating it as an ideal gas.

M = 44.01 g/molP = 150 kPaT = 180 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 645.4 kPa
  2. 2. P = 84.83 kPa
  3. 3. V = 22.74 L
  4. 4. V = 54.14 L
  5. 5. ρ = 2.499 kg/m³
  6. 6. ρ = 1.752 kg/m³

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