AP Chemistry Scoring Guidelines from the 2018 Administration

2018

AP Chemistry

Scoring Guidelines

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AP? CHEMISTRY 2018 SCORING GUIDELINES

Question 1

DH rxn

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AP? CHEMISTRY 2018 SCORING GUIDELINES

Question 1 (continued)

DH rxn

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AP? CHEMISTRY 2018 SCORING GUIDELINES

Question 1 (continued)

DH rxn

DH rxn mol

DH rxn

By doubling the volumes, the number of moles of the reactants are doubled, which doubles the amount of energy produced.

OR

In the second experiment, D

2 mcT mcT D .

2n

n

Thus the magnitude is the same as calculated in the first experiment

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AP? CHEMISTRY 2018 SCORING GUIDELINES

Question 2

()

DH298

DS298

DG298

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