lobna.nassr

Lobna Abdel-Mohsen Ebaid Nassr

Professor - Head Of Chemistry Department- Director of Quality Management Unit - Faculty of Science - Sohag University

Faculty of science

Address: Chemistry Department - Faculty of Science - Sohag University

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Physical Chemistry 251 C

2018-08-29 12:42:48 |

Physical Chemistry for 2nd year "biology" and geology" students


2018-09-01 11:38:57 | Physical Chemistry 251 C
Half life time
Deduce the equation which is used to determine the value of half live time t1/2 for the second order reaction.... Read more

2018-11-13 11:46:55 | Physical Chemistry 251 C
The units of different Rate constants
The units of different Rate constants The _order_ of a rate law is the sum of the exponents of its concentration terms. Once the rate law of a reaction has been determined, that same law can be used to understand more fully the composition of the reaction mixture. More specifically, the reaction or... Read more

2018-10-30 11:36:41 | Physical Chemistry 251 C
First order Reaction
The RATE LAW or RATE EQUATION for a chemical reaction is an equation that links the reaction rate with the concentrations or pressures of the reactants and constant parameters (normally rate coefficients and partial reaction orders). A first order reaction depends on the concentration of only one r... Read more

Forms of Energy

2018-09-01 11:55:28 Physical Chemistry 251 C
KINETIC ENERGY is a form of energy that results from an object's motion. There are many types of motion that use kinetic energy: translation (moving from one place to an Read more

Phase and Phase

2018-11-29 22:53:53 Physical Chemistry 251 C
PHASE: a quantity of matter that is homogeneous throughout. Examples of single phase: ICE WATER PHASEBOUNDARIES: interfaces between different phases. A Read more

Equilibrium

2018-11-29 23:10:31 Physical Chemistry 251 C
EQUILIBRIUM State in which NO SPONTANEOUS CHANGES are observed with respect to TIME. WE ACTUALLY NEVER TOTALLY ACHIEVE EQUILIBRIUM, WE ONLY APPROXIMATE IT. IT TAKES INF Read more

Parallel Rection

2018-12-01 20:25:33 Physical Chemistry 251 C
PARALLEL REACTION Parallel reactions are those reactions in which the reactant can form one of two or more products. Parallel reactions are concurrent chemical reactio Read more

Consecutive Reactions

2018-12-01 20:34:55 Physical Chemistry 251 C
KINETICS OF CONSECUTIVE REACTIONS Many physical chemistry texts discuss the kinetics of sequential or consecutive reactions, viz: _A -k1-> B -k2-> C_ Some of them deriv Read more

Zero - order reaction

2018-12-01 20:43:44 Physical Chemistry 251 C
ZERO-ORDER REACTIONS In some reactions, the rate is _apparently _independent of the reactant concentration. The rates of these ZERO-ORDER REACTIONS do not vary with incr Read more

Rate Determining Step

2018-12-01 20:46:33 Physical Chemistry 251 C
THE RATE DETERMINING STEP The rate determining step is the slowest step of a chemical reaction that determines the speed (rate) at which the overall reaction proceeds. T Read more

Reaction order

2018-12-01 21:00:02 Physical Chemistry 251 C
REACTION ORDER The reaction order is the relationship between the concentrations of species and the rate of a reaction. INTRODUCTION The _order_ of a rate law is the s Read more