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 = 0.5 molV = 40 LT = 75 °CP = ?

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

n = 0.5 molV = 40 LT = 75 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1.5 molV = 5 LT = 30 °CP = ?

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

n = 1.5 molV = 5 LT = 30 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
150 g of O₂V = 5 LT = 70 °CP = ?

A tank of 5 L contains 150 g of O₂ at 70 °C. Treat it as an ideal gas and find the pressure P.

m = 150 gM = 32 g/molV = 5 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
360 g of O₂V = 5 LT = 30 °CP = ?

A tank of 5 L contains 360 g of O₂ at 30 °C. Treat it as an ideal gas and find the pressure P.

m = 360 gM = 32 g/molV = 5 LT = 30 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
N₂, M = 28.01 g/molP = 300 kPaT = 150 °Cρ = ?

Find the density ρ of N₂ at 300 kPa and 150 °C, treating it as an ideal gas.

M = 28.01 g/molP = 300 kPaT = 150 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of CO₂ goes from 100 kPa, 5 L, 15 °C to 450 kPa and 50 °C. Find the new volume V2.

P1 = 100 kPaV1 = 5 LT1 = 15 °CP2 = 450 kPaT2 = 50 °C
V2 = L

Answer key

  1. 1. P = 36.18 kPa
  2. 2. P = 756.1 kPa
  3. 3. P = 2675 kPa
  4. 4. P = 5671 kPa
  5. 5. ρ = 2.389 kg/m³
  6. 6. V2 = 1.246 L

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