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Chemistry
Chemistry
Problem
Which of the following processes at 298 K is expected to have a positive standard entropy change,
Δ
S
∘
\Delta S^{\circ}
Δ
S
∘
? a)
H
2
O
(
l
)
→
H
2
O
(
s
)
\text{H}_2\text{O}(l)\rightarrow \text{H}_2\text{O}(s)
H
2
O
(
l
)
→
H
2
O
(
s
)
b)
N
2
(
g
)
+
3
H
2
(
g
)
→
2
NH
3
(
g
)
\text{N}_2(g)+3\;\text{H}_2(g)\rightarrow 2\;\text{NH}_3(g)
N
2
(
g
)
+
3
H
2
(
g
)
→
2
NH
3
(
g
)
c)
CaCO
3
(
s
)
→
CaO
(
s
)
+
CO
2
(
g
)
\text{CaCO}_3(s)\rightarrow \text{CaO}(s)+\text{CO}_2(g)
CaCO
3
(
s
)
→
CaO
(
s
)
+
CO
2
(
g
)
d)
CaO
(
s
)
+
CO
2
(
g
)
→
CaCO
3
(
s
)
\text{CaO}(s)+\text{CO}_2(g)\rightarrow \text{CaCO}_3(s)
CaO
(
s
)
+
CO
2
(
g
)
→
CaCO
3
(
s
)
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