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 = 10 LT = 5 °CP = ?

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

n = 1 molV = 10 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1.5 molV = 10 LT = 110 °CP = ?

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

n = 1.5 molV = 10 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
490 g of HeP = 750 kPaT = 0 °CV = ?

What volume V does 490 g of He occupy at 750 kPa and 0 °C? Treat it as an ideal gas.

m = 490 gM = 4.003 g/molP = 750 kPaT = 0 °CR = 8.314 J/(mol·K)
V = L
4.Medium
500 g of ArP = 150 kPaT = 55 °CV = ?

What volume V does 500 g of Ar occupy at 150 kPa and 55 °C? Treat it as an ideal gas.

m = 500 gM = 39.95 g/molP = 150 kPaT = 55 °CR = 8.314 J/(mol·K)
V = L
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
Ar, M = 39.95 g/molP = 400 kPaT = 30 °Cρ = ?

Find the density ρ of Ar at 400 kPa and 30 °C, treating it as an ideal gas.

M = 39.95 g/molP = 400 kPaT = 30 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 231.3 kPa
  2. 2. P = 477.8 kPa
  3. 3. V = 370.6 L
  4. 4. V = 227.6 L
  5. 5. ρ = 1.904 kg/m³
  6. 6. ρ = 6.34 kg/m³

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