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Standard VII

Chemistry

Effect of Change of Pressure on State Change of Matter

58.a brass sc...

Question

58.a brass scale of a barometer gives correct reading at 0^°C. alpha of brass=0.00002/^°C.the barometer reads 75cm at 27^°C.the atmospheric pressure at 0^°C is: a)74.20cm b)74.62cm c)74.92cm d)75.04cm

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Q. The brass scale of a barometer gives a reading at zero degree celsius. The Barometer reads 75 cm at 27 degree Celsius. What is the correct atmospheric pressure at 27 degree Celsius. The coefficient of linear expansion Alpha of brass is 2.0 × 10 ^-5 /°c

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