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Science · Grades 10–12

Gas volume and temperature

Assume an ideal gas with constant pressure and amount; temperatures must be in kelvins.

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The key idea

Assume an ideal gas with constant pressure and amount; temperatures must be in kelvins.

V₁/T₁ = V₂/T₂

Worked examples

An ideal gas occupies 14 L at 340 K. With pressure and amount fixed, find its volume at 680 K in L.

14 × 680 / 340 = 28

28 L

An ideal gas occupies 24 L at 240 K. With pressure and amount fixed, find its volume at 720 K in L.

24 × 720 / 240 = 72

72 L

Try it yourself

  1. An ideal gas occupies 11 L at 280 K. With pressure and amount fixed, find its volume at 840 K in L.

  2. An ideal gas occupies 20 L at 200 K. With pressure and amount fixed, find its volume at 400 K in L.

Check your understanding

Answers and marking notes
  1. 33 L

    11 × 840 / 280 = 33

  2. 40 L

    20 × 400 / 200 = 40

Further reading and review references

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Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.