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 = 10 LT = 70 °CP = ?

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

n = 1 molV = 10 LT = 70 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 10 LT = 20 °CP = ?

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

n = 2 molV = 10 LT = 20 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
170 g of HeV = 5 LT = 5 °CP = ?

A tank of 5 L contains 170 g of He at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 170 gM = 4.003 g/molV = 5 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
180 g of CO₂V = 10 LT = 65 °CP = ?

A tank of 10 L contains 180 g of CO₂ at 65 °C. Treat it as an ideal gas and find the pressure P.

m = 180 gM = 44.01 g/molV = 10 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of O₂ goes from 350 kPa, 5 L, 15 °C to 650 kPa and 70 °C. Find the new volume V2.

P1 = 350 kPaV1 = 5 LT1 = 15 °CP2 = 650 kPaT2 = 70 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of Ar goes from 150 kPa, 5 L, 15 °C to 300 kPa and 60 °C. Find the new volume V2.

P1 = 150 kPaV1 = 5 LT1 = 15 °CP2 = 300 kPaT2 = 60 °C
V2 = L

Answer key

  1. 1. P = 285.3 kPa
  2. 2. P = 487.4 kPa
  3. 3. P = 19642 kPa
  4. 4. P = 1150 kPa
  5. 5. V2 = 3.206 L
  6. 6. V2 = 2.89 L

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