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 = 5 molV = 50 LT = 40 °CP = ?

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

n = 5 molV = 50 LT = 40 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2.5 molV = 25 LT = 70 °CP = ?

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

n = 2.5 molV = 25 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
120 g of O₂P = 100 kPaT = 90 °CV = ?

What volume V does 120 g of O₂ occupy at 100 kPa and 90 °C? Treat it as an ideal gas.

m = 120 gM = 32 g/molP = 100 kPaT = 90 °CR = 8.314 J/(mol·K)
V = L
4.Medium
480 g of N₂P = 650 kPaT = 65 °CV = ?

What volume V does 480 g of N₂ occupy at 650 kPa and 65 °C? Treat it as an ideal gas.

m = 480 gM = 28.01 g/molP = 650 kPaT = 65 °CR = 8.314 J/(mol·K)
V = L
5.Hard
CO₂, M = 44.01 g/molP = 350 kPaT = 110 °Cρ = ?

Find the density ρ of CO₂ at 350 kPa and 110 °C, treating it as an ideal gas.

M = 44.01 g/molP = 350 kPaT = 110 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
CO₂, M = 44.01 g/molP = 1000 kPaT = 100 °Cρ = ?

Find the density ρ of CO₂ at 1000 kPa and 100 °C, treating it as an ideal gas.

M = 44.01 g/molP = 1000 kPaT = 100 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 260.4 kPa
  2. 2. P = 285.3 kPa
  3. 3. V = 113.2 L
  4. 4. V = 74.12 L
  5. 5. ρ = 4.835 kg/m³
  6. 6. ρ = 14.19 kg/m³

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