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 = 2.5 molV = 10 LT = 20 °CP = ?

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

n = 2.5 molV = 10 LT = 20 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 10 LT = 30 °CP = ?

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

n = 1 molV = 10 LT = 30 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
190 g of CO₂V = 10 LT = 100 °CP = ?

A tank of 10 L contains 190 g of CO₂ at 100 °C. Treat it as an ideal gas and find the pressure P.

m = 190 gM = 44.01 g/molV = 10 LT = 100 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
200 g of ArV = 50 LT = 30 °CP = ?

A tank of 50 L contains 200 g of Ar at 30 °C. Treat it as an ideal gas and find the pressure P.

m = 200 gM = 39.95 g/molV = 50 LT = 30 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
CO₂, M = 44.01 g/molP = 200 kPaT = 180 °Cρ = ?

Find the density ρ of CO₂ at 200 kPa and 180 °C, treating it as an ideal gas.

M = 44.01 g/molP = 200 kPaT = 180 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of He goes from 150 kPa, 2 L, 30 °C to 350 kPa and 110 °C. Find the new volume V2.

P1 = 150 kPaV1 = 2 LT1 = 30 °CP2 = 350 kPaT2 = 110 °C
V2 = L

Answer key

  1. 1. P = 609.3 kPa
  2. 2. P = 252 kPa
  3. 3. P = 1339 kPa
  4. 4. P = 252.4 kPa
  5. 5. ρ = 2.336 kg/m³
  6. 6. V2 = 1.083 L

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