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

1 Answer
May 4, 2016

Unknown. We would predict it to be negative.


#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.