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Find pressure in mercury coloum

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Asked by ashutosharnold1998 21st December 2019, 8:56 AM
Answered by Expert
Answer:
For ideal gas, at constant volume, pressure is proportional to temperature.
 
Let pressure varies as, P = a × T + b , where a and b are constants
 
at t = 0oC , P = 60 cm of mercury column.    hence we have,  60 = a×0 + b , i.e., b = 60
 
at t = 100°C , P = 100 cm of mercury column. hence we have, 100 = a×100 +60  i.e., a = 0.4
 
Hence pressure at t = 80°C  , P = 0.4 × 80 + 60 = 92 cm of mercury
Answered by Expert 21st December 2019, 9:30 AM
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