On a clear day at sea level, with a temperature of 25 °c, the partial pressure of n2 in air is 0.78 atm and the concentration of nitrogen in water is 5.3⋅10−4 m. when the partial pressure of n2 is atm, the concentration in water is 2.0⋅10−3 m.

Answer : The partial pressure of nitrogen gas is, 2.94 atm

Explanation:

According top the Henry's Law, the concentration of a gas in a liquid is directly proportional to the partial pressure of the gas.

is Henry's constant.

or,

where,

= initial concentration of gas =

= final concentration of gas =

= initial partial pressure of gas = 0.78 atm

= final partial pressure of gas = ?

Now put all the given values in the above formula, we get the final partial pressure of the gas.

Therefore, the partial pressure of nitrogen gas is, 2.94 atm

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.