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 = 2 molV = 10 LT = 115 °CP = ?

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

n = 2 molV = 10 LT = 115 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 50 LT = 45 °CP = ?

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

n = 1 molV = 50 LT = 45 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
190 g of HeP = 600 kPaT = 80 °CV = ?

What volume V does 190 g of He occupy at 600 kPa and 80 °C? Treat it as an ideal gas.

m = 190 gM = 4.003 g/molP = 600 kPaT = 80 °CR = 8.314 J/(mol·K)
V = L
4.Medium
300 g of HeV = 5 LT = 70 °CP = ?

A tank of 5 L contains 300 g of He at 70 °C. Treat it as an ideal gas and find the pressure P.

m = 300 gM = 4.003 g/molV = 5 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
O₂, M = 32 g/molP = 150 kPaT = 30 °Cρ = ?

Find the density ρ of O₂ at 150 kPa and 30 °C, treating it as an ideal gas.

M = 32 g/molP = 150 kPaT = 30 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
O₂, M = 32 g/molP = 150 kPaT = 180 °Cρ = ?

Find the density ρ of O₂ at 150 kPa and 180 °C, treating it as an ideal gas.

M = 32 g/molP = 150 kPaT = 180 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 645.4 kPa
  2. 2. P = 52.9 kPa
  3. 3. V = 232.3 L
  4. 4. P = 42762 kPa
  5. 5. ρ = 1.904 kg/m³
  6. 6. ρ = 1.274 kg/m³

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