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 = 1.5 molV = 50 LT = 115 °CP = ?

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

n = 1.5 molV = 50 LT = 115 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 10 LT = 70 °CP = ?

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

n = 1 molV = 10 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
380 g of N₂P = 800 kPaT = 65 °CV = ?

What volume V does 380 g of N₂ occupy at 800 kPa and 65 °C? Treat it as an ideal gas.

m = 380 gM = 28.01 g/molP = 800 kPaT = 65 °CR = 8.314 J/(mol·K)
V = L
4.Medium
450 g of CO₂P = 150 kPaT = 85 °CV = ?

What volume V does 450 g of CO₂ occupy at 150 kPa and 85 °C? Treat it as an ideal gas.

m = 450 gM = 44.01 g/molP = 150 kPaT = 85 °CR = 8.314 J/(mol·K)
V = L
5.Hard
CH₄, M = 16.04 g/molP = 450 kPaT = 80 °Cρ = ?

Find the density ρ of CH₄ at 450 kPa and 80 °C, treating it as an ideal gas.

M = 16.04 g/molP = 450 kPaT = 80 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
N₂, M = 28.01 g/molP = 1000 kPaT = 70 °Cρ = ?

Find the density ρ of N₂ at 1000 kPa and 70 °C, treating it as an ideal gas.

M = 28.01 g/molP = 1000 kPaT = 70 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 96.81 kPa
  2. 2. P = 285.3 kPa
  3. 3. V = 47.68 L
  4. 4. V = 203 L
  5. 5. ρ = 2.458 kg/m³
  6. 6. ρ = 9.818 kg/m³

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