Question

How does preasure and temperature affect solubility in Gas. Explain why

Answer 1

Effect of Temperature : If temperature is increased the kinetic energy of the gaseous molecules increases and thus it's tendency to escape into gaseous phase increases from the solution. Therefore on increasing the temperature solubility of gas decreases.

Effect of pressure : This can be explained on the basis of Henry's law and Le Chatelier's principle's.
According to the Henry's law

p = k_H c
Where k_H is the Henry's constant
On increasing partial pressure concentration of the gas increases in the liquid thus solubility of gas increases and vice versa.
This law also predicts the usefulness of Le Chatelier's principle.