Category Archives: Physical Chemistry

environment

enviroment mean different thing to different people, and in a different area of study, they also define the eneiroment base on there area of concentration. generaly enviroment can be define as anything that is arround us that we interact with

DERIVATION OF GENERAL EXPRESSION FOR CHEMICAL EQUILIBRIUM

 CHEMICAL EQUILIBRIUM Before beginning with the topic of our discussion, the derivation of equilibrium expression, we have to re-examing the following thermodynamic convention. 1. Any system to which substance is added or substance are ken away from, the system, or

ENTHALPY AND ENTHALPY CHANGES

Enthalpy is a  thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure. Enthalpy of a system is defined by the relation, H= U + pV…………………………..1 U: is the internal energy p:

HEAT CHANGE UNDER CONSTANT VOLUME

The reactions are carried out under constant volume or under constant pressure conditions. Let us now arrive at an expression useful in calculating the heat change in a system under constant volume conditions. let us assume that the work done

State Variables

State Variables A thermodynamic system has to be macroscopic (having a sufficient larger size); this eases measurement of its properties such as; Pressure Volume Temperature Composition Density Such properties are consequently called macroscopic or bulks. These properties are also called

THERMODYNAMIC TERMINOLOGY

System Any part of the universe which is under study is called a system. It can be as simple as a gas contained in a closed vessel or as complicated as a rocket shooting towards moon. A system may be

WHAT IS CHROMATOGRAPHY

CHROMATOGRAPHY AND IT TYPES Chromatography is an analytical method widely employed in the field of chemistry and biology for separation.  The method is used mostly with a natural occurring substance, because most of this naturally occurring substance are mixture of