Answer:
For most of gases like N2, O2, He etc. the value of Henry's constant, KH increases with temperature and as a result of this solubility of gases decreases with increase of temperature. We know, at given temperature.
Partial pressure of gas in solution = KH x mole fraction of gas in sol. KH depends on the nature of gas. For example, KH value of O2 at 293 K is 34.86 while at 393 K it is 46.82 kilo bar.
Answer:
In both the components, water (A component) and alcohol (B component), the molecules are hydrogen bonded, i.e., A-A as well as B-B interactions are mainly H-bonds forces. When these two components are mixed to form the solution, due to molecular collisions A-A and B-B interactions are broken down and new interactions of the type A-B are formed. A-B interactions are also mainly H-bonds i.e., the molecules of one liquid will tend to break the hydrogen bonds in the molecules of other liquid and vice-versa. A-B interactions formed will be weaker than A-A and B-B types of of interactions as the alcohol and water solution show positive deviation and it will lead to increase in volume (ΔVmix is + ve).