The solubility of nitrogen gas in water at 25 °c and a nitrogen pressure of 1.0 atm is 6.9 × 10-4 m. the solubility of nitrogen in water at a nitrogen pressure of 4.5 atm is m.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]