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 = 25 LT = 95 °CP = ?

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

n = 5 molV = 25 LT = 95 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 40 LT = 85 °CP = ?

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

n = 1 molV = 40 LT = 85 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
380 g of O₂V = 30 LT = 35 °CP = ?

A tank of 30 L contains 380 g of O₂ at 35 °C. Treat it as an ideal gas and find the pressure P.

m = 380 gM = 32 g/molV = 30 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
150 g of HeV = 30 LT = 5 °CP = ?

A tank of 30 L contains 150 g of He at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 150 gM = 4.003 g/molV = 30 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
N₂, M = 28.01 g/molP = 150 kPaT = 150 °Cρ = ?

Find the density ρ of N₂ at 150 kPa and 150 °C, treating it as an ideal gas.

M = 28.01 g/molP = 150 kPaT = 150 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
CO₂, M = 44.01 g/molP = 300 kPaT = 0 °Cρ = ?

Find the density ρ of CO₂ at 300 kPa and 0 °C, treating it as an ideal gas.

M = 44.01 g/molP = 300 kPaT = 0 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 612.2 kPa
  2. 2. P = 74.44 kPa
  3. 3. P = 1014 kPa
  4. 4. P = 2889 kPa
  5. 5. ρ = 1.194 kg/m³
  6. 6. ρ = 5.814 kg/m³

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