Free Energy of Dissolution
AP Chemistry · Flashcards · Application
AP CHEMISTRY · FLASHCARDS
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QUESTION
Determine the spontaneity:
△
H
=
5
kJ/mol
\triangle H = 5 \text{ kJ/mol}
△
H
=
5
kJ/mol
,
T
=
298
K
T = 298 \text{ K}
T
=
298
K
,
△
S
=
30
J/mol⋅K
\triangle S = 30 \text{ J/mol·K}
△
S
=
30
J/mol⋅K
.
QUESTION
Calculate
△
G
\triangle G
△
G
with
△
H
=
20
kJ/mol
\triangle H = 20 \text{ kJ/mol}
△
H
=
20
kJ/mol
,
T
=
350
K
T = 350 \text{ K}
T
=
350
K
,
△
S
=
70
J/mol⋅K
\triangle S = 70 \text{ J/mol·K}
△
S
=
70
J/mol⋅K
.
QUESTION
Calculate
△
G
\triangle G
△
G
given
△
H
=
10
kJ/mol
\triangle H = 10 \text{ kJ/mol}
△
H
=
10
kJ/mol
,
T
=
298
K
T = 298 \text{ K}
T
=
298
K
,
△
S
=
50
J/mol⋅K
\triangle S = 50 \text{ J/mol·K}
△
S
=
50
J/mol⋅K
.
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ANSWER
△
G
=
−
4.9
kJ/mol
\triangle G = -4.9 \text{ kJ/mol}
△
G
=
−
4.9
kJ/mol
.
△
G
=
10000
−
298
(
50
)
=
10000
−
14900
=
−
4900
\triangle G = 10000 - 298(50) = 10000 - 14900 = -4900
△
G
=
10000
−
298
(
50
)
=
10000
−
14900
=
−
4900
J/mol.
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