For the reaction given below, the standard change in free energy has a positive value. A+B<-->C+D…
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Question “For the reaction given below, the standard change in free energy has a positive value. A+B<-->C+D…”
For the reaction given below,
the standard change in free energy has a positive value.
A+B<–>C+D
Changing the conditions of
the reaction can alter the value of the change in free energy (?G).
Sort the following conditions as to whether each would decrease the
free energy value, increase the free energy value, or not change
the free energy value for the reaction. For each change, assume
that the other variables are kept constant.
a. Adding a
catalyst
decrease the free energy
value, increase the free energy value, or not change the free
energy
b. increasing
[C] and [D]
decrease the free energy
value, increase the free energy value, or not change the free
energy
c. Coupling
with ATP hydrolysis
decrease the free energy
value, increase the free energy value, or not change the free
energy
d.Increasing
[A] and [B]
decrease the free energy
value, increase the free energy value, or not change the free
energy
Answer
Standard change in energy is the energy difference between standard free energy of products and standard free energy reactants. Standard change in energy is energy that explains the spontaneity and nature of the reaction.
If the standard change in free energy is positive, it means that it’s anendergonic, while a negative value indicates exergonic reactions.
Part of
Given equilibrium reaction
is the equilibrium constant in terms of concentration.
If we add, catalyst to this reaction also
remains same, which means that there is no change in equilibrium constant by the addition of catalyst.
This means that the equilibrium reaction does not produce any change in the energy freed by adding the catalyst.
Part B
is the equilibrium constant in terms of concentration.
If the product concentration is increased, that is, C and D concentrations increase, Equilibrium constant (
) also increases.
Therefore, increasing the product concentrations will increase the free energy.
Part C
Given equilibrium reaction
The standard change in energy free of charge has a positive value, which means that the reaction can be called anendergonic.
ATP hydrolysis, an exergonic reaction, is energy-friendly and has a standard free energy value of less than zero [negative].
This is why you can reduce the reaction with ATP Hydrolysis Free Energy by coupling it.
Part d
is the equilibrium constant in terms of concentration.
), decreases when we increase the concentrations of reactants.
The concentrations of reactants increase, reducing the free energy.
Ans: Part A
Free energy is not a change
Part b
This increases the energy-free value
Part c
Diminishes the energy-free value
Part d
Diminishes the energy-free value
Conclusion
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