A potential energy diagram is shown. A graph is plotted with Potential Energy in KJ on the y axis and Reaction Pathway on the x axis. The graph starts at 30 on the y axis and it is initially horizontal, labeled Reactants, and then rises up as a smooth curve and reaches its peak when y is 65 kilojoules. The curve comes down until y is 55 kilojoules where it becomes horizontal again, and it is labeled Products.

What is the total change in enthalpy of this reaction? (4 points)

Group of answer choices

25 kJ

30 kJ

35 kJ

55 kJ

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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the answer is b. dilution

i think its 100

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