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 = 5 molV = 5 LT = 25 °CP = ?

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

n = 5 molV = 5 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 50 LT = 65 °CP = ?

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

n = 2 molV = 50 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
200 g of N₂P = 700 kPaT = 65 °CV = ?

What volume V does 200 g of N₂ occupy at 700 kPa and 65 °C? Treat it as an ideal gas.

m = 200 gM = 28.01 g/molP = 700 kPaT = 65 °CR = 8.314 J/(mol·K)
V = L
4.Medium
340 g of N₂V = 50 LT = 60 °CP = ?

A tank of 50 L contains 340 g of N₂ at 60 °C. Treat it as an ideal gas and find the pressure P.

m = 340 gM = 28.01 g/molV = 50 LT = 60 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
Ar, M = 39.95 g/molP = 600 kPaT = 30 °Cρ = ?

Find the density ρ of Ar at 600 kPa and 30 °C, treating it as an ideal gas.

M = 39.95 g/molP = 600 kPaT = 30 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
O₂, M = 32 g/molP = 750 kPaT = 130 °Cρ = ?

Find the density ρ of O₂ at 750 kPa and 130 °C, treating it as an ideal gas.

M = 32 g/molP = 750 kPaT = 130 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 2479 kPa
  2. 2. P = 112.5 kPa
  3. 3. V = 28.68 L
  4. 4. P = 672.4 kPa
  5. 5. ρ = 9.51 kg/m³
  6. 6. ρ = 7.16 kg/m³

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