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 = 40 LT = 150 °CP = ?

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

n = 0.5 molV = 40 LT = 150 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 5 LT = 0 °CP = ?

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

n = 2 molV = 5 LT = 0 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
480 g of ArV = 20 LT = 20 °CP = ?

A tank of 20 L contains 480 g of Ar at 20 °C. Treat it as an ideal gas and find the pressure P.

m = 480 gM = 39.95 g/molV = 20 LT = 20 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
370 g of ArV = 20 LT = 35 °CP = ?

A tank of 20 L contains 370 g of Ar at 35 °C. Treat it as an ideal gas and find the pressure P.

m = 370 gM = 39.95 g/molV = 20 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
N₂, M = 28.01 g/molP = 900 kPaT = 160 °Cρ = ?

Find the density ρ of N₂ at 900 kPa and 160 °C, treating it as an ideal gas.

M = 28.01 g/molP = 900 kPaT = 160 °CR = 8.314 J/(mol·K)
ρ = kg/m³
6.Hard
State 1State 2

A fixed amount of CO₂ goes from 150 kPa, 5 L, 35 °C to 200 kPa and 90 °C. Find the new volume V2.

P1 = 150 kPaV1 = 5 LT1 = 35 °CP2 = 200 kPaT2 = 90 °C
V2 = L

Answer key

  1. 1. P = 43.98 kPa
  2. 2. P = 908.4 kPa
  3. 3. P = 1464 kPa
  4. 4. P = 1186 kPa
  5. 5. ρ = 7 kg/m³
  6. 6. V2 = 4.419 L

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