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 = 3 molV = 15 LT = 95 °CP = ?

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

n = 3 molV = 15 LT = 95 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 20 LT = 15 °CP = ?

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

n = 1 molV = 20 LT = 15 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
470 g of CO₂V = 30 LT = 25 °CP = ?

A tank of 30 L contains 470 g of CO₂ at 25 °C. Treat it as an ideal gas and find the pressure P.

m = 470 gM = 44.01 g/molV = 30 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
390 g of N₂V = 5 LT = 45 °CP = ?

A tank of 5 L contains 390 g of N₂ at 45 °C. Treat it as an ideal gas and find the pressure P.

m = 390 gM = 28.01 g/molV = 5 LT = 45 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
He, M = 4.003 g/molP = 200 kPaT = 190 °Cρ = ?

Find the density ρ of He at 200 kPa and 190 °C, treating it as an ideal gas.

M = 4.003 g/molP = 200 kPaT = 190 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of He goes from 300 kPa, 2 L, 15 °C to 450 kPa and 200 °C. Find the new volume V2.

P1 = 300 kPaV1 = 2 LT1 = 15 °CP2 = 450 kPaT2 = 200 °C
V2 = L

Answer key

  1. 1. P = 612.2 kPa
  2. 2. P = 119.8 kPa
  3. 3. P = 882.4 kPa
  4. 4. P = 7366 kPa
  5. 5. ρ = 0.2079 kg/m³
  6. 6. V2 = 2.189 L

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