Solution

When two components of a solution are mixed ther will be afree energy change and an entropy change involved resulting in either an evolution or an absorption of heat by the system such changes can be measured and can lead to athermodynamic approach to the study of solution such as those in alloy systems,slags and aqueous of solurtions such as those in alloy systems slags and aqueous systems,will cosider the concept of activities in solution and the thermodynamics of solutions which are of fundamental importance to the student of metallurgy whether his interest is in metal extraction corrosion or physical metallurgy.
A perfect theory of chemical kinetics should prvide a method of calculating the rate of any reaction from certain basc principles such atheory has not been produced and there are many difficulites standing in the way of the final calculations in addiation to the complexity of elucidating a basic theory .However we are able to understand certain factors which affect reaction rates and can sometime predict their values with the aid of existing theories.considering ahomogenous bimolecular reaction in he gas phase between two hypothetical molecules a and b it is reeasonable to suppose that.for reaction to occure the molecules a and b must collide.the collision theory of reaction rates due manily to workof w use the kinetick theory of gases to calculate the number of times one molecules of a collides with one of b we will call the total number of colliision per second tacking place between a and b in one cubic centeimetre.then if we assume that each time ,