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 = 0.5 molV = 15 LT = 105 °CP = ?

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

n = 0.5 molV = 15 LT = 105 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 5 LT = 105 °CP = ?

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

n = 2 molV = 5 LT = 105 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
10 g of ArV = 5 LT = 70 °CP = ?

A tank of 5 L contains 10 g of Ar at 70 °C. Treat it as an ideal gas and find the pressure P.

m = 10 gM = 39.95 g/molV = 5 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
60 g of HeV = 10 LT = 45 °CP = ?

A tank of 10 L contains 60 g of He at 45 °C. Treat it as an ideal gas and find the pressure P.

m = 60 gM = 4.003 g/molV = 10 LT = 45 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
He, M = 4.003 g/molP = 600 kPaT = 120 °Cρ = ?

Find the density ρ of He at 600 kPa and 120 °C, treating it as an ideal gas.

M = 4.003 g/molP = 600 kPaT = 120 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
O₂, M = 32 g/molP = 600 kPaT = 10 °Cρ = ?

Find the density ρ of O₂ at 600 kPa and 10 °C, treating it as an ideal gas.

M = 32 g/molP = 600 kPaT = 10 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 104.8 kPa
  2. 2. P = 1258 kPa
  3. 3. P = 142.8 kPa
  4. 4. P = 3965 kPa
  5. 5. ρ = 0.7348 kg/m³
  6. 6. ρ = 8.156 kg/m³

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