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 molV = 20 LT = 25 °CP = ?

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

n = 1 molV = 20 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 4 molV = 5 LT = 65 °CP = ?

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

n = 4 molV = 5 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
250 g of O₂V = 20 LT = 50 °CP = ?

A tank of 20 L contains 250 g of O₂ at 50 °C. Treat it as an ideal gas and find the pressure P.

m = 250 gM = 32 g/molV = 20 LT = 50 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
80 g of O₂V = 10 LT = 25 °CP = ?

A tank of 10 L contains 80 g of O₂ at 25 °C. Treat it as an ideal gas and find the pressure P.

m = 80 gM = 32 g/molV = 10 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
He, M = 4.003 g/molP = 800 kPaT = 70 °Cρ = ?

Find the density ρ of He at 800 kPa and 70 °C, treating it as an ideal gas.

M = 4.003 g/molP = 800 kPaT = 70 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
He, M = 4.003 g/molP = 650 kPaT = 0 °Cρ = ?

Find the density ρ of He at 650 kPa and 0 °C, treating it as an ideal gas.

M = 4.003 g/molP = 650 kPaT = 0 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 123.9 kPa
  2. 2. P = 2249 kPa
  3. 3. P = 1049 kPa
  4. 4. P = 619.7 kPa
  5. 5. ρ = 1.122 kg/m³
  6. 6. ρ = 1.146 kg/m³

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