Skip to main content

WORLD OF RASAYAN

Search This Blog

Instant QR code generator

on November 09, 2024

Get link
Facebook
X
Pinterest
Email
Other Apps

Instant QR Code Generator

Instant QR Code Generator

Enter Number or Text: Or Upload an Image:

Get link
Facebook
X
Pinterest
Email
Other Apps

Comments

Post a Comment

Labels

Acids and Bases
Atomic Structure
Chemical bonds
Chemical Kinetics
Electronic effects
Friction story
Ideal Gas
Inorganic Chemistry
Interdisciplinary
Intermolecular Forces

Natural compounds
NCERT
Organic Chemistry
Periodic table
Physical
Physical Chemistry
question answer
Radioactivity
Reaction Mechanism
Rearrangement
Thermodynamics

Show more Show less

Popular Posts

Atomic Structure mock test

Atomic Structure Mock Test Atomic Structure Mock Test Submit Test Retake Test

Introduction to Chemical kinetics

Introduction Chemical kinetics is the branch of physical chemistry which deals with a study of the speed of chemical reactions. Such studies also enable us to understand the mechanism by which the reactions occur. In chemical equilibria, only the initial and final states were considered, the energy relations between the reactants and the products being governed by thermodynamics where the time or the intermediate states were of no concern. In chemical kinetics the rate of the reaction process is followed; in other words, the time variable is introduced. This, we shall see, reveals not only the influence of different factors on the progress of the reaction but it also throws light on the mechanism through which reactant molecules are transformed into products. It is a common knowledge that apart from the chemical nature, the rates of reaction depend on the concentration of reactants and the temperature. It will be seen later that many reaction rates are greatly influenced by the...

Concept of 'Work' in Thermodynamics

The concepts of heat and work are of fundamental importance in thermodynamics. Work and heat are algebraic quantities and can be positive or negative. They appear only during a change in the state of the system and appear only at the boundary of the system. They are manifestations of energy. Work Work is a basic mode of energy transfer. An object is displaced through a distance dx against a force F(x) then the amount of work which has to be done is defined as W = -F(x)dx In SI System of units, work is expressed in joule or kilojoule; 1J = 1 Nm. When work is done on the system W and when work is done by the system W is negative. There are many types of work and all of them could be expressed as the product of two factors; (i) intensity, and (ii) capacity. Some of these types are: Gravitational work: Gravitational work is said to be done when a body is raised through a certain height against the gravitational field. If a body of mass m is raised through a height h agai...

Powered by Blogger