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 = 40 LT = 135 °CP = ?

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

n = 1 molV = 40 LT = 135 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 25 LT = 130 °CP = ?

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

n = 1 molV = 25 LT = 130 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
290 g of CH₄V = 10 LT = 5 °CP = ?

A tank of 10 L contains 290 g of CH₄ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 290 gM = 16.04 g/molV = 10 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
140 g of CH₄V = 50 LT = 20 °CP = ?

A tank of 50 L contains 140 g of CH₄ at 20 °C. Treat it as an ideal gas and find the pressure P.

m = 140 gM = 16.04 g/molV = 50 LT = 20 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of CH₄ goes from 300 kPa, 10 L, 30 °C to 200 kPa and 180 °C. Find the new volume V2.

P1 = 300 kPaV1 = 10 LT1 = 30 °CP2 = 200 kPaT2 = 180 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of O₂ goes from 100 kPa, 20 L, 20 °C to 550 kPa and 160 °C. Find the new volume V2.

P1 = 100 kPaV1 = 20 LT1 = 20 °CP2 = 550 kPaT2 = 160 °C
V2 = L

Answer key

  1. 1. P = 84.83 kPa
  2. 2. P = 134.1 kPa
  3. 3. P = 4181 kPa
  4. 4. P = 425.5 kPa
  5. 5. V2 = 22.42 L
  6. 6. V2 = 5.373 L

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