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 = 5 LT = 60 °CP = ?

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

n = 0.5 molV = 5 LT = 60 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 5 molV = 15 LT = 120 °CP = ?

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

n = 5 molV = 15 LT = 120 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
60 g of CO₂V = 20 LT = 55 °CP = ?

A tank of 20 L contains 60 g of CO₂ at 55 °C. Treat it as an ideal gas and find the pressure P.

m = 60 gM = 44.01 g/molV = 20 LT = 55 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
10 g of CH₄V = 30 LT = 90 °CP = ?

A tank of 30 L contains 10 g of CH₄ at 90 °C. Treat it as an ideal gas and find the pressure P.

m = 10 gM = 16.04 g/molV = 30 LT = 90 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
O₂, M = 32 g/molP = 600 kPaT = 90 °Cρ = ?

Find the density ρ of O₂ at 600 kPa and 90 °C, treating it as an ideal gas.

M = 32 g/molP = 600 kPaT = 90 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of He goes from 200 kPa, 5 L, 10 °C to 150 kPa and 170 °C. Find the new volume V2.

P1 = 200 kPaV1 = 5 LT1 = 10 °CP2 = 150 kPaT2 = 170 °C
V2 = L

Answer key

  1. 1. P = 277 kPa
  2. 2. P = 1090 kPa
  3. 3. P = 186 kPa
  4. 4. P = 62.74 kPa
  5. 5. ρ = 6.359 kg/m³
  6. 6. V2 = 10.43 L

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