A gas occupies 500 cm³ at a pressure of 150 kPa. What volume will it occupy if the pressure is increased to 250 kPa at the same temperature?

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Question

A gas occupies 500 cm³ at a pressure of 150 kPa. What volume will it occupy if the pressure is increased to 250 kPa at the same temperature?

Accepted Answer

300 cm³ — Using P₁V₁ = P₂V₂: 150 × 500 = 250 × V₂, so V₂ = 75000 ÷ 250 = 300 cm³. As pressure increases, volume decreases, so options C and D are physically unreasonable. A common error is to calculate 500 × 250 ÷ 150 instead of 500 × 150 ÷ 250.

Answer

300 cm³

Answer

833 cm³

Answer

750 cm³

Answer

200 cm³

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