Answer:
Basing on explanations below;
1. Endothermic reactions have a positive enthalpy while Exothermic reactions have a negative enthalpy.
2. Endothermic reactions take place in high temperatures while Exothermic reactions take place in low temperatures.
Answer:
hii
Explanation:
NaCl + AgNO3 = AgCl + NaNO3
So visualize soil mixed with water. To separate it, you can use a sieve to filter the water.
At anode,
Cd-----> + 2
At cathode,
+ 2e -----> Ni
Overall reaction,
+ Cd(s) ------> + Ni K=1.17
(aq) (aq) (s)
By nernst equation,
E= - Log K
Where,
F=96500c/mol
M=2
T=298K
E=Zero at equilibrium
R=8.314 J
0= - Log(1.17)
= 0.150v
what is nernst equation?
The Nernst equation is a chemical thermodynamical relationship used in electrochemistry that enables the determination of a reaction's reduction potential (half-cell or full-cell reaction) from the standard electrode potential, absolute temperature, the number of electrons involved in the oxydo-reduction reaction, and activities (often approximated by concentrations) of the chemical species undergoing reduction and oxidation, respectively. It was given the equation's original name in honor of the German physical scientist Walther Nernst.
The link between cell potential, standard potential, and the behaviors of electrically active (electroactive) species is described by the Nernst equation. It links the standard cell potential to the effective concentrations (activities) of the reaction's constituent parts.
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