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 = 4 molV = 50 LT = 130 °CP = ?

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

n = 4 molV = 50 LT = 130 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 3 molV = 15 LT = 150 °CP = ?

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

n = 3 molV = 15 LT = 150 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
470 g of O₂P = 100 kPaT = 85 °CV = ?

What volume V does 470 g of O₂ occupy at 100 kPa and 85 °C? Treat it as an ideal gas.

m = 470 gM = 32 g/molP = 100 kPaT = 85 °CR = 8.314 J/(mol·K)
V = L
4.Medium
410 g of ArV = 50 LT = 100 °CP = ?

A tank of 50 L contains 410 g of Ar at 100 °C. Treat it as an ideal gas and find the pressure P.

m = 410 gM = 39.95 g/molV = 50 LT = 100 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of O₂ goes from 200 kPa, 10 L, 35 °C to 300 kPa and 240 °C. Find the new volume V2.

P1 = 200 kPaV1 = 10 LT1 = 35 °CP2 = 300 kPaT2 = 240 °C
V2 = L
6.Hard
CO₂, M = 44.01 g/molP = 550 kPaT = 0 °Cρ = ?

Find the density ρ of CO₂ at 550 kPa and 0 °C, treating it as an ideal gas.

M = 44.01 g/molP = 550 kPaT = 0 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 268.1 kPa
  2. 2. P = 703.6 kPa
  3. 3. V = 437.3 L
  4. 4. P = 636.8 kPa
  5. 5. V2 = 11.1 L
  6. 6. ρ = 10.66 kg/m³

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