Exergonic and Endergonic reactions Flashcards
What is an exergonic reaciton?
A reaction where energy is released, the products end with less energy than the substrates started with
What is the function of activation energy?
To break the unstable energy barrier between reactants and products,
- This point in the reaction is called the transition state
What is the difference between an exergonic reaction and an exothermic reaction?
- Exothermic focuses on changes in heat
- Exergonic focuses on changes in energy
What are some features of an exergonic reaction?
- Catabolic reaction
- Substrates are broken into products
- Negative change in energy/ΔG/ energy is released
- Spontaneous reaction
How are bonds broken in an exergonic reaction?
Energy must be inputted into the substrates
Which has more energy in an exergonic reaction. the substrates or the products?
Substrates, there is a negative ΔG (energy)
What is ΔG on an exergonic graph?
The energy change between the substrate and products
- Product energy - substrate energy
What is an endergonic reaction?
A reaction where energy is gained, the products end with more energy than the substrates started with due to an input of additional energy
What are the features of an endergonic reaction?
- Anabolic reaction
- Substrates are built into products
- Positive change in energy/ΔG/ Energy is gained
- Not spontaneous because additional energy must be added to the substrates
What is the difference between an endergonic reaction and an endothermic reaction?
- Endergonic reactions focus on changes in energy
- Endothermic reactions focus on changes in heat
Why do the products in an endergonic reaction end with more energy than the substrates?
Energy must be inputted to build the bonds when combining substrates
Why is there a small release of energy in an endergonic reaction?
This energy is used to build the bonds
How do enzymes affect endergonic and exergonic reactions?
They lower the activation energy of the reaction, so there is an increased rate of reaction.
- They do NOT affect the change in energy/ ΔG
- NO effect on the energy of the substrate and products
