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 molV = 15 LT = 75 °CP = ?

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

n = 1 molV = 15 LT = 75 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 10 LT = 110 °CP = ?

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

n = 1 molV = 10 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
60 g of HeV = 30 LT = 55 °CP = ?

A tank of 30 L contains 60 g of He at 55 °C. Treat it as an ideal gas and find the pressure P.

m = 60 gM = 4.003 g/molV = 30 LT = 55 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
240 g of N₂P = 600 kPaT = 75 °CV = ?

What volume V does 240 g of N₂ occupy at 600 kPa and 75 °C? Treat it as an ideal gas.

m = 240 gM = 28.01 g/molP = 600 kPaT = 75 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of Ar goes from 250 kPa, 2 L, 20 °C to 650 kPa and 50 °C. Find the new volume V2.

P1 = 250 kPaV1 = 2 LT1 = 20 °CP2 = 650 kPaT2 = 50 °C
V2 = L
6.Hard
N₂, M = 28.01 g/molP = 800 kPaT = 200 °Cρ = ?

Find the density ρ of N₂ at 800 kPa and 200 °C, treating it as an ideal gas.

M = 28.01 g/molP = 800 kPaT = 200 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 193 kPa
  2. 2. P = 318.6 kPa
  3. 3. P = 1363 kPa
  4. 4. V = 41.34 L
  5. 5. V2 = 0.848 L
  6. 6. ρ = 5.696 kg/m³

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