What is the enthalpy for the reaction Ca(OH)2 (s) + CO2 (g) --> CaCO3 (s) + H2O (l)?

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What is the enthalpy for the reaction Ca(OH)2 (s) + CO2 (g) --> CaCO3 (s) + H2O (l)?

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Answer 1 · 2016-05-04T05:31:01

Unknown. We would predict it to be negative.

Explanation:

$C a {(O H)}_{2} (s) + C O_{2} (g) \to C a C O_{3} (s) ⏐ ↓ + H_{2} O (l)$ $Ca(OH)_2(s) + CO_2(g) rarr CaCO_3(s)darr + H_2O(l)$

The formation of solid calcium carbonate is a bond forming reaction. A solid precipitate of calcium carbonate occurs. We would thus predict the enthalpy of the reaction to be negative. To give numbers we need experimental data.

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What is the enthalpy for the reaction Ca(OH)2 (s) + CO2 (g) --> CaCO3 (s) + H2O (l)?

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