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 = 130 °CP = ?

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

n = 1 molV = 10 LT = 130 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1.5 molV = 5 LT = 110 °CP = ?

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

n = 1.5 molV = 5 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
330 g of HeP = 300 kPaT = 25 °CV = ?

What volume V does 330 g of He occupy at 300 kPa and 25 °C? Treat it as an ideal gas.

m = 330 gM = 4.003 g/molP = 300 kPaT = 25 °CR = 8.314 J/(mol·K)
V = L
4.Medium
160 g of O₂P = 150 kPaT = 70 °CV = ?

What volume V does 160 g of O₂ occupy at 150 kPa and 70 °C? Treat it as an ideal gas.

m = 160 gM = 32 g/molP = 150 kPaT = 70 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of CO₂ goes from 250 kPa, 20 L, 30 °C to 500 kPa and 170 °C. Find the new volume V2.

P1 = 250 kPaV1 = 20 LT1 = 30 °CP2 = 500 kPaT2 = 170 °C
V2 = L
6.Hard
CH₄, M = 16.04 g/molP = 1000 kPaT = 10 °Cρ = ?

Find the density ρ of CH₄ at 1000 kPa and 10 °C, treating it as an ideal gas.

M = 16.04 g/molP = 1000 kPaT = 10 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 335.2 kPa
  2. 2. P = 955.7 kPa
  3. 3. V = 681.2 L
  4. 4. V = 95.1 L
  5. 5. V2 = 14.62 L
  6. 6. ρ = 6.814 kg/m³

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