Why do we use mercury in boyle's law instead of water?
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heya...........4.32am
#......Pressure is measured as P= hρg, where h is the height of the liquid, ρ(rho) is the relative density (specific gravity) of the liquid, and g is the acceleration due to gravity. this implies h is inversely proportional to density.
The relative density of mercury is 13.56 implying that it is 13.56 times denser than water and therefore rises to a height 13.56 times less than water in the Boyles apparatus....#
#...Mercury in the Boyle's apparatus rises to 760mm at sea level (therefore atmospheric pressure=760mmHg). On the other hand, if water had been used in the place of mercury, it would rise to 10305.5mm, which necessitates such a long and cumbersome apparatus, which incidentally due to the reasons above-mentioned, also less accurate..........#
tysm..................@kundan
#......Pressure is measured as P= hρg, where h is the height of the liquid, ρ(rho) is the relative density (specific gravity) of the liquid, and g is the acceleration due to gravity. this implies h is inversely proportional to density.
The relative density of mercury is 13.56 implying that it is 13.56 times denser than water and therefore rises to a height 13.56 times less than water in the Boyles apparatus....#
#...Mercury in the Boyle's apparatus rises to 760mm at sea level (therefore atmospheric pressure=760mmHg). On the other hand, if water had been used in the place of mercury, it would rise to 10305.5mm, which necessitates such a long and cumbersome apparatus, which incidentally due to the reasons above-mentioned, also less accurate..........#
tysm..................@kundan
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