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 = 40 LT = 125 °CP = ?

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

n = 4 molV = 40 LT = 125 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 4 molV = 5 LT = 10 °CP = ?

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

n = 4 molV = 5 LT = 10 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
210 g of CH₄P = 550 kPaT = 70 °CV = ?

What volume V does 210 g of CH₄ occupy at 550 kPa and 70 °C? Treat it as an ideal gas.

m = 210 gM = 16.04 g/molP = 550 kPaT = 70 °CR = 8.314 J/(mol·K)
V = L
4.Medium
110 g of ArP = 250 kPaT = 100 °CV = ?

What volume V does 110 g of Ar occupy at 250 kPa and 100 °C? Treat it as an ideal gas.

m = 110 gM = 39.95 g/molP = 250 kPaT = 100 °CR = 8.314 J/(mol·K)
V = L
5.Hard
N₂, M = 28.01 g/molP = 450 kPaT = 110 °Cρ = ?

Find the density ρ of N₂ at 450 kPa and 110 °C, treating it as an ideal gas.

M = 28.01 g/molP = 450 kPaT = 110 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of N₂ goes from 250 kPa, 5 L, 35 °C to 650 kPa and 150 °C. Find the new volume V2.

P1 = 250 kPaV1 = 5 LT1 = 35 °CP2 = 650 kPaT2 = 150 °C
V2 = L

Answer key

  1. 1. P = 331 kPa
  2. 2. P = 1883 kPa
  3. 3. V = 67.91 L
  4. 4. V = 34.17 L
  5. 5. ρ = 3.957 kg/m³
  6. 6. V2 = 2.641 L

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