Absolute Entropy and Entropy Change
AP Chemistry · Flashcards · Application
AP CHEMISTRY · FLASHCARDS
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QUESTION
Calculate the entropy change when 1 mol of ice melts at 0°C.
QUESTION
Find the entropy change for a system where
q
rev
=
200
J
q_{\text{rev}} = 200 \text{ J}
q
rev
=
200
J
and
T
=
400
K
T = 400 \text{ K}
T
=
400
K
.
QUESTION
Determine the change in entropy for a system with
q
rev
=
−
100
J
q_{\text{rev}} = -100 \text{ J}
q
rev
=
−
100
J
and
T
=
300
K
T = 300 \text{ K}
T
=
300
K
.
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ANSWER
△
S
=
−
0.33
J/K
\triangle S = -0.33 \text{ J/K}
△
S
=
−
0.33
J/K
. Using
△
S
=
q
rev
T
=
−
100
300
\triangle S = \frac{q_{\text{rev}}}{T} = \frac{-100}{300}
△
S
=
T
q
rev
=
300
−
100
.
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