Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
As already discussed, the reduction of the metallic oxide usually heating it with some reducing agent such as carbon, carbon monoxide, hydrogen or some other metal. The reducing agent joins with oxygen of the metal oxide.
M2O2 + yC xM +yCO Some metals oxides get reduced easily while others are reduced with difficulty. Some oxides are condensed at relatively low temperatures while others are reduced at relatively high temperatures. Thermodynamic considerations play an important role in deciding the temperature and the choice of reducing agent in the thermal reduction during metallurgy. For a spontaneous process, the changes in Gibbs energy ΔG must be negative. The changes in Gibbs energy ΔG for any process at any specific temperature, is described by the equation ΔG = ΔH - TΔS Where, ΔH is the enthalpy change T is the absolute temperature and ΔS is the entropy change for the process. For any reaction, this change could also be described from the equation: ΔG° = RTInK Where, K is the equilibrium constant of the 'reactant product' system at temperature T. a negative value of ΔG implies a positive value of K. Consider a reaction, the randomness of the system decreases because the gases have more randomness than solids. Hence, ΔS for this reaction is negative. Thus, if temperature is increased then TΔS becomes more negative. Since TΔS is subtracted in equation, ΔGbecomes less negative. On the other hand, if ΔS is positive, on increasing the temperature of ΔG decreased and becomes more negative. For example, in the reaction, 2C (s) + O2 (g) 2CO (g) ΔS is positive and ΔG decreases and becomes more negative as the T increases. If the reactants and products of two reactions are put together in a system and the net Gibbs free energy change, ΔG of the two possible reactions is negative, and then the overall reaction will occur. Thus, the process of interpretation of feasibility of a process involve coupling of the reactions, calculating the sum of their ΔG and then observing the magnitude and sign of ΔG. Such coupling is easily understood in the form of Ellingham diagram.
glutamic acid standard estimation protocol
Name the chemical components which constitute nucleotides. Write any two functions of nucleotides in a cell.
2+2
WRITE HALF-REACTION FOR THE REDOX Fe2+ + MnO4- =Fe3+ + Mn2+
Types of Substituents which Produce Directive Effect There are two kinds of substituents which generate directive effect are, (i) Those that direct the incoming group to ort
what is the structural formula for hexane-1,6-dioic acid
if one ton contains 2000 pounds and the coal is 2% by mass sulfur, what is the mass sulfur in one ton of coal? how many grams of sulfur is this? how many moles of sulfur is this?
Q. What is softening of water? Describe deionization method of water softening with diagram. Ans. Softening of water: The process of removing the hardness causing salts from
Alkyl groups - IUPAC System of Naming Organic Compounds These groups involves one hydrogen atom less as compared to the alkane. These groups are named by substituting the suff
during the process of extraction of pure copper from copper pyrite,SiO2 acts as acidic flux which combines with iron oxide(FeO) to form iron silicate(FeSiO3). CuFeS2 + heat ---> Cu
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd