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Tardigrade
Question
Chemistry
Consider the reaction 2 NO ( g )+ O 2( g ) longrightarrow 2 NO 2( g ) Predict whether the reaction is spontaneous at 298 K . Δ f G°( NO )=86.69 kJ / mol , Δ f G°( NO 2) =51.84 k J / mol
Q. Consider the reaction
2
N
O
(
g
)
+
O
2
(
g
)
⟶
2
N
O
2
(
g
)
Predict whether the reaction is spontaneous at
298
K
.Δ
f
G
∘
(
NO
)
=
86.69
k
J
/
m
o
l
,
Δ
f
G
∘
(
N
O
2
)
=
51.84
k
J
/
m
o
l
3907
236
Thermodynamics
Report Error
A
Spontaneous
35%
B
Non-spontaneous
19%
C
Equilibrium
38%
D
Cannot predict
8%
Solution:
For the reaction:
2
N
O
(
g
)
+
O
2
(
g
)
⟶
2
N
O
2
(
g
)
Δ
G
∘
=
2
Δ
f
G
∘
(
N
O
2
)
−
[
2
Δ
f
G
∘
(
NO
)
+
Δ
f
G
∘
(
O
2
)
]
=
(
2
×
51.84
)
−
(
2
×
86.69
+
0
)
=
103.68
−
173
−
38
=
−
69.7
k
J
/
m
o
l
;
Δ
G
∘
is negative
So, the reaction is spontaneous.