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Equilibria
Equilibrium can also exist in between the same species in two different forms e.g. liquid and solid, liquid and gas. An equilibrium constant may also be produced for every of these systems.
Conditions of equilibrium
For the general reaction:
aA+bB→cC+dD
The change in Gibbs free energy, ΔG (see Topic B6) for the reaction at a temperature, T, is given by:
Where Q is the reaction quotient,
The free energy change of both the reverse and the forward reaction is equal. This is when ΔGback=ΔG=0. In this case, the rate constants for the forward and back reactions, kf and kb, and the activities of reactants and products are such that both forward and reverse reactions are occurring at an equal rate and the reaction is at equilibrium.
DISAVANTAGES OF FLAME AAS
H-C=CH-CH-c
An example for trihydric phenols
Q. What is Stoichiometry? Ans. As you know a chemical equation is like a recipe. Each of the different ingredients combine in certain ratios to form the end product. The
CH3CH=CH-CHO
The bond energy of an O- H bond is 109 kcal mol 1. When a mole of water is formed from H and O atoms, then 218 kcal is released. Two O-H bonds are there is H2O so 2*109 kcal an
Tiffeneau-Demjanov Rearrangement examples
Given that dH for the reaction is -92.2 kJ mol-1, which is larger, the total bond dissociation energy of the reactants or the total bond dissociation energy of the products?
What property command to water soluble vitamins permits water solubility Ans) Because of 1]OH bond between them 2] polar componets 3] Availibility of in nature
What are the basic physical and chemical properties of this group
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