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 = 0.5 molV = 40 LT = 40 °CP = ?

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

n = 0.5 molV = 40 LT = 40 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 2 molV = 5 LT = 35 °CP = ?

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

n = 2 molV = 5 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
220 g of CH₄V = 5 LT = 5 °CP = ?

A tank of 5 L contains 220 g of CH₄ at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 220 gM = 16.04 g/molV = 5 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
20 g of ArV = 5 LT = 35 °CP = ?

A tank of 5 L contains 20 g of Ar at 35 °C. Treat it as an ideal gas and find the pressure P.

m = 20 gM = 39.95 g/molV = 5 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of N₂ goes from 350 kPa, 20 L, 20 °C to 350 kPa and 70 °C. Find the new volume V2.

P1 = 350 kPaV1 = 20 LT1 = 20 °CP2 = 350 kPaT2 = 70 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of CO₂ goes from 350 kPa, 2 L, 40 °C to 800 kPa and 230 °C. Find the new volume V2.

P1 = 350 kPaV1 = 2 LT1 = 40 °CP2 = 800 kPaT2 = 230 °C
V2 = L

Answer key

  1. 1. P = 32.54 kPa
  2. 2. P = 1025 kPa
  3. 3. P = 6344 kPa
  4. 4. P = 256.5 kPa
  5. 5. V2 = 23.41 L
  6. 6. V2 = 1.406 L

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