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 = 4 molV = 20 LT = 85 °CP = ?

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

n = 4 molV = 20 LT = 85 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 1 molV = 10 LT = 35 °CP = ?

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

n = 1 molV = 10 LT = 35 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
380 g of N₂P = 450 kPaT = 85 °CV = ?

What volume V does 380 g of N₂ occupy at 450 kPa and 85 °C? Treat it as an ideal gas.

m = 380 gM = 28.01 g/molP = 450 kPaT = 85 °CR = 8.314 J/(mol·K)
V = L
4.Medium
110 g of HeV = 5 LT = 65 °CP = ?

A tank of 5 L contains 110 g of He at 65 °C. Treat it as an ideal gas and find the pressure P.

m = 110 gM = 4.003 g/molV = 5 LT = 65 °CR = 8.314 J/(mol·K)
P = kPa
5.Hard
State 1State 2

A fixed amount of He goes from 200 kPa, 2 L, 30 °C to 650 kPa and 250 °C. Find the new volume V2.

P1 = 200 kPaV1 = 2 LT1 = 30 °CP2 = 650 kPaT2 = 250 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of Ar goes from 250 kPa, 20 L, 25 °C to 400 kPa and 160 °C. Find the new volume V2.

P1 = 250 kPaV1 = 20 LT1 = 25 °CP2 = 400 kPaT2 = 160 °C
V2 = L

Answer key

  1. 1. P = 595.5 kPa
  2. 2. P = 256.2 kPa
  3. 3. V = 89.77 L
  4. 4. P = 15451 kPa
  5. 5. V2 = 1.062 L
  6. 6. V2 = 18.16 L

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