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 = 1.5 molV = 25 LT = 5 °CP = ?

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

n = 1.5 molV = 25 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 15 LT = 115 °CP = ?

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

n = 0.5 molV = 15 LT = 115 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
450 g of HeV = 50 LT = 0 °CP = ?

A tank of 50 L contains 450 g of He at 0 °C. Treat it as an ideal gas and find the pressure P.

m = 450 gM = 4.003 g/molV = 50 LT = 0 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
470 g of N₂P = 300 kPaT = 25 °CV = ?

What volume V does 470 g of N₂ occupy at 300 kPa and 25 °C? Treat it as an ideal gas.

m = 470 gM = 28.01 g/molP = 300 kPaT = 25 °CR = 8.314 J/(mol·K)
V = L
5.Hard
CO₂, M = 44.01 g/molP = 500 kPaT = 190 °Cρ = ?

Find the density ρ of CO₂ at 500 kPa and 190 °C, treating it as an ideal gas.

M = 44.01 g/molP = 500 kPaT = 190 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
CO₂, M = 44.01 g/molP = 350 kPaT = 60 °Cρ = ?

Find the density ρ of CO₂ at 350 kPa and 60 °C, treating it as an ideal gas.

M = 44.01 g/molP = 350 kPaT = 60 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 138.8 kPa
  2. 2. P = 107.6 kPa
  3. 3. P = 5106 kPa
  4. 4. V = 138.6 L
  5. 5. ρ = 5.715 kg/m³
  6. 6. ρ = 5.561 kg/m³

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