Because she was a polar bear. Because she was white. Because bears always dissolve in water. To get to the other side. Heating a solution of O 2 gas in water drives O 2 out of the solution.
Substances have a higher solubility in a solvent when the temperature is increased.
Increasing the partial pressure of a gas over a liquid increases the amount of gas dissolved. Boiling occurs when the vapor pressure of a liquid equals the surrounding pressure. Each solvent has its own particular freezing point depression constant that does not depend on the identity of the solute. Increasing the temperature of a liquid increases its vapor pressure. A .10 molal solution of NaCl in water would have the same boiling point as 0.10 glucose molal solution.