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In a rigid, closed container, calcium carbonate decomposes reversibly to form calcium oxide and carbon dioxide . The forward reaction absorbs of heat.
(
Ca
C
O
3
)
(
Ca
O
)
(
C
O
2
)
178.1
kilojoules
Ca
C
O
3
(s)
178.1
k
J
Ca
O
(s)
C
O
2
(g)
After equilibrium is established, more is added to the container. How does the equilibrium respond to this change?
Ca
C
O
3
The equilibrium shifts toward the reactants.
The equilibrium shifts toward the products.
The equilibrium does not shift.
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