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 = 50 LT = 150 °CP = ?

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

n = 1.5 molV = 50 LT = 150 °CR = 8.314 J/(mol·K)
P = kPa
2.Easy
n = 3 molV = 5 LT = 25 °CP = ?

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

n = 3 molV = 5 LT = 25 °CR = 8.314 J/(mol·K)
P = kPa
3.Medium
480 g of ArV = 20 LT = 5 °CP = ?

A tank of 20 L contains 480 g of Ar at 5 °C. Treat it as an ideal gas and find the pressure P.

m = 480 gM = 39.95 g/molV = 20 LT = 5 °CR = 8.314 J/(mol·K)
P = kPa
4.Medium
180 g of ArP = 250 kPaT = 65 °CV = ?

What volume V does 180 g of Ar occupy at 250 kPa and 65 °C? Treat it as an ideal gas.

m = 180 gM = 39.95 g/molP = 250 kPaT = 65 °CR = 8.314 J/(mol·K)
V = L
5.Hard
State 1State 2

A fixed amount of Ar goes from 150 kPa, 5 L, 30 °C to 600 kPa and 110 °C. Find the new volume V2.

P1 = 150 kPaV1 = 5 LT1 = 30 °CP2 = 600 kPaT2 = 110 °C
V2 = L
6.Hard
State 1State 2

A fixed amount of N₂ goes from 250 kPa, 2 L, 25 °C to 150 kPa and 150 °C. Find the new volume V2.

P1 = 250 kPaV1 = 2 LT1 = 25 °CP2 = 150 kPaT2 = 150 °C
V2 = L

Answer key

  1. 1. P = 105.5 kPa
  2. 2. P = 1487 kPa
  3. 3. P = 1389 kPa
  4. 4. V = 50.67 L
  5. 5. V2 = 1.58 L
  6. 6. V2 = 4.731 L

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