Florie Mitchell
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26. In which of the following reactions would
the products have a lower volume than the
reactants?
A 2C(s) + O2(g) → 2CO(g)
B C(s) + O2(g) → CO2(g)
C CaCO3(s) + 2HCl(aq)
→ CaCl2(aq) + CO2(g) + H2O(ℓ)
D Ca(OH)2(aq) + 2CO2(g)
→ Ca(HCO3)2(aq)
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pwk123
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Think about the states of matter of the reactants and products
Which state of matter is most dense (so takes up the least volume) and which is least dense?
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Florie Mitchell
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(Original post by pwk123)
Think about the states of matter of the reactants and products
Which state of matter is most dense (so takes up the least volume) and which is least dense?
So A?
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Florie Mitchell
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(Original post by Florie Mitchell)
So A?
Oh wait no it would be D
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pwk123
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(Original post by Florie Mitchell)
Oh wait no it would be D
What's your reasoning?

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It's correct though
Last edited by pwk123; 1 month ago
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Florie Mitchell
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Is it because gas is the least dense state of matter meaning that it takes up the most volume. And D is the only answer which doesn't have a gaseous product, meaning the reactant therefore take up more volume?
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