a)In terms of this graph, how much energy could you get from burning hydrogen? b

ID: 1052133 • Letter: A

Question

a)In terms of this graph, how much energy could you get from burning hydrogen?

b)How much energy would you need to produce the hydrogen from the original water?

c)How much energy could be produced by the complete set of reactions?

d)If you were to find a good catalyst for this reaction, how would it change the energy graph?

e)How would the catalyst change the amount of energy that this water to hydrogen to water cycle could produce?

H2O2 H20O H20 Starting Materials Interme diates Products Reaction path

a)In terms of this graph, how much energy could you get from burning hydrogen?

the correct answer will be given if:

Hrxn = Hproducts - Hreactants = H-H2O - H(H2 and O2)

b)How much energy would you need to produce the hydrogen from the original water?

0, since initial and final states are exactly in the same level of energy, meaning the energy released/absorbed is 0

c)How much energy could be produced by the complete set of reactions?

Total energy is written in two set of steps:

Step 1 --> H2O to H2 and O2 energy

Step 2 --> H2 and O2 energy to H2O

d)If you were to find a good catalyst for this reaction, how would it change the energy graph?

Energy of intermediates will be lower... starting material + products will remain th esame

e)How would the catalyst change the amount of energy that this water to hydrogen to water cycle could produce?

it will be lowered in general

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