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 = 4 molV = 20 LT = 0 °CP = ?

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

n = 4 molV = 20 LT = 0 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 5 LT = 65 °CP = ?

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

n = 2 molV = 5 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
420 g of HeP = 300 kPaT = 60 °CV = ?

What volume V does 420 g of He occupy at 300 kPa and 60 °C? Treat it as an ideal gas.

m = 420 gM = 4.003 g/molP = 300 kPaT = 60 °CR = 8.314 J/(mol·K)
V = L
4.Medium
300 g of N₂V = 5 LT = 45 °CP = ?

A tank of 5 L contains 300 g of N₂ at 45 °C. Treat it as an ideal gas and find the pressure P.

m = 300 gM = 28.01 g/molV = 5 LT = 45 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of CH₄ goes from 150 kPa, 2 L, 40 °C to 550 kPa and 170 °C. Find the new volume V2.

P1 = 150 kPaV1 = 2 LT1 = 40 °CP2 = 550 kPaT2 = 170 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of CO₂ goes from 200 kPa, 10 L, 25 °C to 250 kPa and 220 °C. Find the new volume V2.

P1 = 200 kPaV1 = 10 LT1 = 25 °CP2 = 250 kPaT2 = 220 °C
V2 = L

Answer key

  1. 1. P = 454.2 kPa
  2. 2. P = 1125 kPa
  3. 3. V = 968.7 L
  4. 4. P = 5666 kPa
  5. 5. V2 = 0.7719 L
  6. 6. V2 = 13.23 L

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