# The order of the Reaction, for example, characteristics

Many times questions arise or may be required by a teacher or in some exams — How To Learn the order of Reaction, first, second, Zero order Reaction examples.

it is defined as the number of molecules concentration (changes) refers to the rate of the reaction. In other words, it is the sum of power of concentration of the reactants in the rate equation (rate law). Reaction whose rate is determined by change of one concentration term only is known as first order reaction. The rate of such reaction at any moment is so is given by the expression Where CA is the concentration of reactant A at the moment when the rate of reaction is determined and K is rate constant, a specific rate constant or velocity constant. Because of the slow (rate determining) step involves only one Molecule, the sequence reaction is one and not, although the reaction is usually written as For first-order reaction, the half-time.e, t, x becomes a. so, putting t t — two and A A two — by-two in eq. (I) we get Note that the half-life time of a first order reaction is constant and independent of the initial concentration of the reactant. (ii) The unit of second order rate constant is liter mole- time. The value of K depends on the units in which concentration of reactant(s) is expressed. (iii) The half-life of a second-order reaction is inversely proportional to the initial concentration of magsasanib i.e, t — α — a (cf. half-life period of a first order reaction is inversely proportional to K and independent of a) (iv) When a graph is plotted between t and one — (a — x), a straight line is obtained the slope of the line gives one — K. the Reaction rate is not affected by the concentration or where the concentration of magsasanib do not change with time. So the rates of such reactions remains ongoing.

### Many photochemical reactions (ex

formation of HCl from H and Cl) and some heterogeneous reaction (ex. the decomposition of hydrogen iodide and ammonia on the surface of the gold and tungsten) the examples of zero order reactions. The concentration of product increases linearly in time. The plot of concentration of products with time is a straight line passing through the origin. It is all about the basics — How To Learn the order of Reaction, first, second, Zero order Reaction examples. This is an example widget to show how the right Sidebar looks by default. You can add custom widgets from the widgets screen in the admin. If custom widgets are added and after that it will be replaced by widgets