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 = 25 LT = 75 °CP = ?

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

n = 5 molV = 25 LT = 75 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 15 LT = 20 °CP = ?

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

n = 2 molV = 15 LT = 20 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
350 g of O₂V = 10 LT = 55 °CP = ?

A tank of 10 L contains 350 g of O₂ at 55 °C. Treat it as an ideal gas and find the pressure P.

m = 350 gM = 32 g/molV = 10 LT = 55 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
360 g of O₂V = 30 LT = 80 °CP = ?

A tank of 30 L contains 360 g of O₂ at 80 °C. Treat it as an ideal gas and find the pressure P.

m = 360 gM = 32 g/molV = 30 LT = 80 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of N₂ goes from 400 kPa, 2 L, 15 °C to 550 kPa and 210 °C. Find the new volume V2.

P1 = 400 kPaV1 = 2 LT1 = 15 °CP2 = 550 kPaT2 = 210 °C
V2 = L
6.Hard
He, M = 4.003 g/molP = 700 kPaT = 180 °Cρ = ?

Find the density ρ of He at 700 kPa and 180 °C, treating it as an ideal gas.

M = 4.003 g/molP = 700 kPaT = 180 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 578.9 kPa
  2. 2. P = 325 kPa
  3. 3. P = 2984 kPa
  4. 4. P = 1101 kPa
  5. 5. V2 = 2.439 L
  6. 6. ρ = 0.7438 kg/m³

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