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 = 1.5 molV = 25 LT = 25 °CP = ?

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

n = 1.5 molV = 25 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 0.5 molV = 50 LT = 15 °CP = ?

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

n = 0.5 molV = 50 LT = 15 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
440 g of CO₂V = 10 LT = 5 °CP = ?

A tank of 10 L contains 440 g of CO₂ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 440 gM = 44.01 g/molV = 10 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
500 g of CO₂P = 450 kPaT = 60 °CV = ?

What volume V does 500 g of CO₂ occupy at 450 kPa and 60 °C? Treat it as an ideal gas.

m = 500 gM = 44.01 g/molP = 450 kPaT = 60 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of He goes from 150 kPa, 2 L, 35 °C to 600 kPa and 50 °C. Find the new volume V2.

P1 = 150 kPaV1 = 2 LT1 = 35 °CP2 = 600 kPaT2 = 50 °C
V2 = L
6.Hard
CH₄, M = 16.04 g/molP = 850 kPaT = 0 °Cρ = ?

Find the density ρ of CH₄ at 850 kPa and 0 °C, treating it as an ideal gas.

M = 16.04 g/molP = 850 kPaT = 0 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 148.7 kPa
  2. 2. P = 23.96 kPa
  3. 3. P = 2312 kPa
  4. 4. V = 69.93 L
  5. 5. V2 = 0.5243 L
  6. 6. ρ = 6.004 kg/m³

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