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Thermodynamics and Thermochemistry
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Gibbs energy, spontaneity and relation to equilibrium constant
NEET level
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Difficulty 1 of 3
td095
A reaction with
Δ
H
<
0
and
Δ
S
>
0
is
A
spontaneous only at high temperatures
B
spontaneous at all temperatures
C
spontaneous only at low temperatures
D
non-spontaneous at all temperatures
Answer: B
Δ
G
=
Δ
H
−
T
Δ
S
. With
Δ
H
negative and
−
T
Δ
S
negative,
Δ
G
is negative at every temperature, so the reaction is always spontaneous.
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