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 = 4 molV = 10 LT = 50 °CP = ?

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

n = 4 molV = 10 LT = 50 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 15 LT = 35 °CP = ?

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

n = 1 molV = 15 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
110 g of CH₄P = 100 kPaT = 65 °CV = ?

What volume V does 110 g of CH₄ occupy at 100 kPa and 65 °C? Treat it as an ideal gas.

m = 110 gM = 16.04 g/molP = 100 kPaT = 65 °CR = 8.314 J/(mol·K)
V = L
4.Medium
360 g of CO₂V = 10 LT = 90 °CP = ?

A tank of 10 L contains 360 g of CO₂ at 90 °C. Treat it as an ideal gas and find the pressure P.

m = 360 gM = 44.01 g/molV = 10 LT = 90 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
CO₂, M = 44.01 g/molP = 550 kPaT = 70 °Cρ = ?

Find the density ρ of CO₂ at 550 kPa and 70 °C, treating it as an ideal gas.

M = 44.01 g/molP = 550 kPaT = 70 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
O₂, M = 32 g/molP = 250 kPaT = 40 °Cρ = ?

Find the density ρ of O₂ at 250 kPa and 40 °C, treating it as an ideal gas.

M = 32 g/molP = 250 kPaT = 40 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 1075 kPa
  2. 2. P = 170.8 kPa
  3. 3. V = 192.8 L
  4. 4. P = 2470 kPa
  5. 5. ρ = 8.484 kg/m³
  6. 6. ρ = 3.073 kg/m³

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