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 = 40 LT = 110 °CP = ?

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

n = 5 molV = 40 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 20 LT = 85 °CP = ?

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

n = 1 molV = 20 LT = 85 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
230 g of CH₄V = 20 LT = 60 °CP = ?

A tank of 20 L contains 230 g of CH₄ at 60 °C. Treat it as an ideal gas and find the pressure P.

m = 230 gM = 16.04 g/molV = 20 LT = 60 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
430 g of CH₄P = 300 kPaT = 5 °CV = ?

What volume V does 430 g of CH₄ occupy at 300 kPa and 5 °C? Treat it as an ideal gas.

m = 430 gM = 16.04 g/molP = 300 kPaT = 5 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of He goes from 100 kPa, 10 L, 30 °C to 450 kPa and 110 °C. Find the new volume V2.

P1 = 100 kPaV1 = 10 LT1 = 30 °CP2 = 450 kPaT2 = 110 °C
V2 = L
6.Hard
CO₂, M = 44.01 g/molP = 800 kPaT = 170 °Cρ = ?

Find the density ρ of CO₂ at 800 kPa and 170 °C, treating it as an ideal gas.

M = 44.01 g/molP = 800 kPaT = 170 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 398.2 kPa
  2. 2. P = 148.9 kPa
  3. 3. P = 1986 kPa
  4. 4. V = 206.6 L
  5. 5. V2 = 2.809 L
  6. 6. ρ = 9.556 kg/m³

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