Biochemistry: There are a number of different equations used to calculate the de
ID: 513974 • Letter: B
Question
Biochemistry:
There are a number of different equations used to calculate the deltaG of a reaction. For each equation below (5a-5c), define each term in the equation, if a number is a constant indicate what that value is and for all terms were needed indicate what units that value will be expressed with.
5. There are a number of different equations used to calculate the AG of a reaction. For each equation below (5a-5c) define each term in the equation, if a number is a constant indicate what that values is and for all terms were needed indicate what units that value will be expressed with. (15 points) 5a. AG AH-TAS 5b. AG AG'o RT lnKeg 5c. AG nFAEExplanation / Answer
5a) Delta G change in free energy of the system (the energy available to do work). Units kJ/mol
Delta H - change in enthalpy or total heat content of the sytem Units kJ/mol
Delta S - the change in disorder/ randomness of system Units J/K
T - absolute temperature where the reaction is carried out
5b) delta Go the change in free energy of the system under standard conditions .
Standard state in thermodyanmics is themost stable state of substance at 1atm pressure at the given temperature (mostly 298K)
R- the universal gas constant with values
R = 2Cal/K.mol
R= 8.314 J/K.mol
R = 0.0821 L.atm/k.mol
T- absolute temperature
Keq = equilibrium constant of the reaction
5C) this relation is used to measure electrical free energy of a spontaneous redox reaction.
n = number of electrons transferred during the redox reaction,
F = faraday = 96500 C
Faraday is the charge of one mole of electrons.
Delta E = the difference in voltage of the electrochemical/ electrolytic cell.
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