A gas occupies 750 ml at S . T .P . Find the volume occupied by the gas when its pressure is 500 ml of Hg and it temperature is 20 ° C
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Answer:
1223.52 ml (correct to 2 decimal places)
Explanation:
V1 = 750 ml
T1 = 273 K
P1 = 760 mm Hg
T2 = 20°C = 293 K
P2 = 500 mm Hg
V2 = ?
By using combined gas equation,
P1V1/T1 = P2V2/T2
=> 760 × 750/273 = 500V2/293
=> V2 = (760 × 750 × 293)/(273 × 500)
= 1223.52 ml (correct to 2 decimal places)
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