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 = 0.5 molV = 50 LT = 140 °CP = ?

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

n = 0.5 molV = 50 LT = 140 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 5 molV = 15 LT = 15 °CP = ?

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

n = 5 molV = 15 LT = 15 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
240 g of HeP = 600 kPaT = 35 °CV = ?

What volume V does 240 g of He occupy at 600 kPa and 35 °C? Treat it as an ideal gas.

m = 240 gM = 4.003 g/molP = 600 kPaT = 35 °CR = 8.314 J/(mol·K)
V = L
4.Medium
420 g of O₂P = 250 kPaT = 95 °CV = ?

What volume V does 420 g of O₂ occupy at 250 kPa and 95 °C? Treat it as an ideal gas.

m = 420 gM = 32 g/molP = 250 kPaT = 95 °CR = 8.314 J/(mol·K)
V = L
5.Hard
CO₂, M = 44.01 g/molP = 100 kPaT = 60 °Cρ = ?

Find the density ρ of CO₂ at 100 kPa and 60 °C, treating it as an ideal gas.

M = 44.01 g/molP = 100 kPaT = 60 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of He goes from 150 kPa, 20 L, 25 °C to 500 kPa and 150 °C. Find the new volume V2.

P1 = 150 kPaV1 = 20 LT1 = 25 °CP2 = 500 kPaT2 = 150 °C
V2 = L

Answer key

  1. 1. P = 34.35 kPa
  2. 2. P = 798.6 kPa
  3. 3. V = 256 L
  4. 4. V = 160.7 L
  5. 5. ρ = 1.589 kg/m³
  6. 6. V2 = 8.516 L

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