Overall, the difference is that Henry's law takes care of what happen IN the solution when you have gas over it, while Raoult's law looks at what is happening OVER the solution when you mix a non-volatile solute to a solvent that has a known vapor pressure when it's pure (e.g. water). read more
Henry’s law explains the solubility of gas in liquid. According to Henry’s law,pressure is directly proportional to the mole fraction of gas. P = KH X. When KH and P⁰ are same ,then Raoult’s law becomes special case of Henry’s law. This happens in case of few ideal solutions of gas in liquid. read more
Difference Between Henry’s Law and Raoult’s Law Definition. Henry’s Law: Henry’s law is a thermodynamic law that explains the dissolution of a gas in a liquid medium. Raoult’s Law: Raoult’s law is a thermodynamic law that explains the relationship between the vapor pressure of a solution and the partial pressures of solutes in that solution. read more
Similarities between Raoult's law And Henry's law: (i)Both apply to the volatile component of the solution. (ii) Both state that the vapour pressure of any component in the solution is proportional to the mole fraction of that component in the solution. Dissimilarities : The two laws differ in the proportionality constant. read more