Question

1. At a constant temperature, a gas at a pressure of 1200 mm of mercury, Occupies volume of
1500 cm. If volume is decreased by 40%, find the new pressure.
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Answer 1

Answer:

2000 mmHg

Explanation:

40% of 1500 cm³

= 40/100 × 1500 cm³

= 600 cm³

For a gas at constant temperature

PV = constant

P1V1 = P2V2

P2 = (P1V1)/V2

= (1200 mmHg × 1500 cm³) / (1500 cm³ - 600 cm³)

= 2000 mmHg

Answer 2

Answer:2000mm of Hg

Explanation:volume decreased by40%

40/100×1500=600

1500-600=900cm^3

P1V1=P2V2

1200×1500=P2×900

P2= 1200×1500/900

P2=2000mm of Hg