A student performed an experiment to measure pressure and volume of a gas at constant temperature and noted the following: Pressure
(mm of Hg) | Volume
(cm³) --------------------| ----------------------- 100 | 80 125 | x 200 | 40 y | 32 Calculate the value of x and y. Which law was used in the calculations? Draw graphs to show: (i) volume plotted against pressure. (ii) PV plotted against pressure

Question

KnowledgeBoat · Accepted Answer

(a) V₁ = Initial volume of the gas = 80 cm³ P₁ = Initial pressure of the gas = 100 mm of Hg P₂ = Final pressure of the gas = 125 mm of Hg V₂ = Final volume = ? By Boyle's Law: Substituting the values : ∴ x = 64 cm³ (b) V₁ = Initial volume of the gas = 40 cm³ P₁ = Initial pressure of the gas = 200 mm of Hg V₂ = Final volume of the gas = 32 cm³ P₂ = Final pressure of the gas = ? By Boyle's Law: Substituting the values : ∴ y = 250 mm of Hg (i) Graph of volume plotted against pressure : Pressure
(mm of Hg) | Volume
(cm³) --------------------| ----------------------- 100 | 80 125 | 64 200 | 40 250 | 32 (ii) Graph of PV plotted against pressure : Pressure
(mm of Hg) | Volume
(cm³) | PV -----------------------| -------------------------- | -- 100 | 80 | 8000 125 | 64 | 8000 200 | 40 | 8000 250 | 32 | 8000

Chemistry

Gas Laws

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