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 = 2.5 molV = 25 LT = 130 °CP = ?

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

n = 2.5 molV = 25 LT = 130 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 5 LT = 5 °CP = ?

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

n = 1 molV = 5 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
450 g of CO₂P = 300 kPaT = 60 °CV = ?

What volume V does 450 g of CO₂ occupy at 300 kPa and 60 °C? Treat it as an ideal gas.

m = 450 gM = 44.01 g/molP = 300 kPaT = 60 °CR = 8.314 J/(mol·K)
V = L
4.Medium
220 g of CH₄P = 350 kPaT = 0 °CV = ?

What volume V does 220 g of CH₄ occupy at 350 kPa and 0 °C? Treat it as an ideal gas.

m = 220 gM = 16.04 g/molP = 350 kPaT = 0 °CR = 8.314 J/(mol·K)
V = L
5.Hard
Ar, M = 39.95 g/molP = 400 kPaT = 200 °Cρ = ?

Find the density ρ of Ar at 400 kPa and 200 °C, treating it as an ideal gas.

M = 39.95 g/molP = 400 kPaT = 200 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of CO₂ goes from 300 kPa, 10 L, 35 °C to 100 kPa and 170 °C. Find the new volume V2.

P1 = 300 kPaV1 = 10 LT1 = 35 °CP2 = 100 kPaT2 = 170 °C
V2 = L

Answer key

  1. 1. P = 335.2 kPa
  2. 2. P = 462.5 kPa
  3. 3. V = 94.4 L
  4. 4. V = 88.99 L
  5. 5. ρ = 4.062 kg/m³
  6. 6. V2 = 43.14 L

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