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 molV = 15 LT = 90 °CP = ?

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

n = 1 molV = 15 LT = 90 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1.5 molV = 5 LT = 55 °CP = ?

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

n = 1.5 molV = 5 LT = 55 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
40 g of ArV = 30 LT = 0 °CP = ?

A tank of 30 L contains 40 g of Ar at 0 °C. Treat it as an ideal gas and find the pressure P.

m = 40 gM = 39.95 g/molV = 30 LT = 0 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
420 g of CO₂V = 5 LT = 100 °CP = ?

A tank of 5 L contains 420 g of CO₂ at 100 °C. Treat it as an ideal gas and find the pressure P.

m = 420 gM = 44.01 g/molV = 5 LT = 100 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of He goes from 300 kPa, 10 L, 40 °C to 250 kPa and 160 °C. Find the new volume V2.

P1 = 300 kPaV1 = 10 LT1 = 40 °CP2 = 250 kPaT2 = 160 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of O₂ goes from 150 kPa, 20 L, 25 °C to 200 kPa and 90 °C. Find the new volume V2.

P1 = 150 kPaV1 = 20 LT1 = 25 °CP2 = 200 kPaT2 = 90 °C
V2 = L

Answer key

  1. 1. P = 201.3 kPa
  2. 2. P = 818.5 kPa
  3. 3. P = 75.79 kPa
  4. 4. P = 5921 kPa
  5. 5. V2 = 16.6 L
  6. 6. V2 = 18.27 L

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