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Chemistry
Chemistry
Problem
For each process below, state whether it is a chemical change or a physical change and provide a brief justification. (i)
I
2
(
s
)
⇌
I
2
(
g
)
\text{I}_2(s) \rightleftharpoons \text{I}_2(g)
I
2
(
s
)
⇌
I
2
(
g
)
(ii)
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
)
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