(a) Explain the following phenomena with the help of Henry's law.
(i) Painful condition known as bends.
(ii) Feeling of weakness and discomfort in breathing at high altitude.
(b) Why soda water bottle kept at room temperature fizzes on opening?

Explanation

(a) (i) Henry's law represents a relation between solubility of gases in liquid and pressure. Scuba drivers when comes towards surface, the pressure gradually decre ases. This reduced pressure released the dissolve gas present in blood and leads to formation of bubbles of nitrogen in the blood.
This cr ea tes a painful condition by blocking capiollaries known as blends.
(ii) At high altitude atmospheric pressure is low as compared to surface shich causes difficult inbreating. On that condition we feel weakness and discomfort.
(b) Soda water bottle kept at room temperature fizzes on opening due to different pressure inside and outside the bottle. When the bottle is opened to air, the partical pressure of `CO_(2)` above the solution decreases As a result, solubility dec re ases and hence `CO_(2)` bubbles out.