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 = 1.5 molV = 10 LT = 95 °CP = ?

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

n = 1.5 molV = 10 LT = 95 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 5 LT = 100 °CP = ?

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

n = 1 molV = 5 LT = 100 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
80 g of CO₂P = 800 kPaT = 0 °CV = ?

What volume V does 80 g of CO₂ occupy at 800 kPa and 0 °C? Treat it as an ideal gas.

m = 80 gM = 44.01 g/molP = 800 kPaT = 0 °CR = 8.314 J/(mol·K)
V = L
4.Medium
340 g of N₂V = 5 LT = 50 °CP = ?

A tank of 5 L contains 340 g of N₂ at 50 °C. Treat it as an ideal gas and find the pressure P.

m = 340 gM = 28.01 g/molV = 5 LT = 50 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of O₂ goes from 400 kPa, 2 L, 15 °C to 350 kPa and 60 °C. Find the new volume V2.

P1 = 400 kPaV1 = 2 LT1 = 15 °CP2 = 350 kPaT2 = 60 °C
V2 = L
6.Hard
CO₂, M = 44.01 g/molP = 450 kPaT = 80 °Cρ = ?

Find the density ρ of CO₂ at 450 kPa and 80 °C, treating it as an ideal gas.

M = 44.01 g/molP = 450 kPaT = 80 °CR = 8.314 J/(mol·K)
ρ = kg/m³

Answer key

  1. 1. P = 459.1 kPa
  2. 2. P = 620.5 kPa
  3. 3. V = 5.16 L
  4. 4. P = 6522 kPa
  5. 5. V2 = 2.643 L
  6. 6. ρ = 6.745 kg/m³

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