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 = 50 LT = 150 °CP = ?

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

n = 1.5 molV = 50 LT = 150 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 10 LT = 80 °CP = ?

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

n = 2 molV = 10 LT = 80 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
340 g of HeP = 500 kPaT = 10 °CV = ?

What volume V does 340 g of He occupy at 500 kPa and 10 °C? Treat it as an ideal gas.

m = 340 gM = 4.003 g/molP = 500 kPaT = 10 °CR = 8.314 J/(mol·K)
V = L
4.Medium
480 g of N₂P = 750 kPaT = 0 °CV = ?

What volume V does 480 g of N₂ occupy at 750 kPa and 0 °C? Treat it as an ideal gas.

m = 480 gM = 28.01 g/molP = 750 kPaT = 0 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of He goes from 400 kPa, 20 L, 15 °C to 200 kPa and 110 °C. Find the new volume V2.

P1 = 400 kPaV1 = 20 LT1 = 15 °CP2 = 200 kPaT2 = 110 °C
V2 = L
6.Hard
O₂, M = 32 g/molP = 500 kPaT = 10 °Cρ = ?

Find the density ρ of O₂ at 500 kPa and 10 °C, treating it as an ideal gas.

M = 32 g/molP = 500 kPaT = 10 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 105.5 kPa
  2. 2. P = 587.2 kPa
  3. 3. V = 399.9 L
  4. 4. V = 51.89 L
  5. 5. V2 = 53.19 L
  6. 6. ρ = 6.797 kg/m³

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