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 = 1.5 molV = 25 LT = 25 °CP = ?

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

n = 1.5 molV = 25 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 5 molV = 10 LT = 110 °CP = ?

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

n = 5 molV = 10 LT = 110 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
310 g of N₂P = 750 kPaT = 75 °CV = ?

What volume V does 310 g of N₂ occupy at 750 kPa and 75 °C? Treat it as an ideal gas.

m = 310 gM = 28.01 g/molP = 750 kPaT = 75 °CR = 8.314 J/(mol·K)
V = L
4.Medium
320 g of HeV = 5 LT = 35 °CP = ?

A tank of 5 L contains 320 g of He at 35 °C. Treat it as an ideal gas and find the pressure P.

m = 320 gM = 4.003 g/molV = 5 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of O₂ goes from 100 kPa, 20 L, 10 °C to 250 kPa and 190 °C. Find the new volume V2.

P1 = 100 kPaV1 = 20 LT1 = 10 °CP2 = 250 kPaT2 = 190 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of CH₄ goes from 200 kPa, 5 L, 30 °C to 700 kPa and 100 °C. Find the new volume V2.

P1 = 200 kPaV1 = 5 LT1 = 30 °CP2 = 700 kPaT2 = 100 °C
V2 = L

Answer key

  1. 1. P = 148.7 kPa
  2. 2. P = 1593 kPa
  3. 3. V = 42.71 L
  4. 4. P = 40961 kPa
  5. 5. V2 = 13.09 L
  6. 6. V2 = 1.758 L

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