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 = 5 molV = 25 LT = 75 °CP = ?

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

n = 5 molV = 25 LT = 75 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 10 LT = 100 °CP = ?

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

n = 2 molV = 10 LT = 100 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
90 g of HeP = 700 kPaT = 90 °CV = ?

What volume V does 90 g of He occupy at 700 kPa and 90 °C? Treat it as an ideal gas.

m = 90 gM = 4.003 g/molP = 700 kPaT = 90 °CR = 8.314 J/(mol·K)
V = L
4.Medium
200 g of O₂P = 500 kPaT = 80 °CV = ?

What volume V does 200 g of O₂ occupy at 500 kPa and 80 °C? Treat it as an ideal gas.

m = 200 gM = 32 g/molP = 500 kPaT = 80 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of CO₂ goes from 400 kPa, 10 L, 15 °C to 450 kPa and 190 °C. Find the new volume V2.

P1 = 400 kPaV1 = 10 LT1 = 15 °CP2 = 450 kPaT2 = 190 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of Ar goes from 350 kPa, 10 L, 20 °C to 700 kPa and 60 °C. Find the new volume V2.

P1 = 350 kPaV1 = 10 LT1 = 20 °CP2 = 700 kPaT2 = 60 °C
V2 = L

Answer key

  1. 1. P = 578.9 kPa
  2. 2. P = 620.5 kPa
  3. 3. V = 96.97 L
  4. 4. V = 36.7 L
  5. 5. V2 = 14.29 L
  6. 6. V2 = 5.682 L

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