Answer to Question #97449 in General Chemistry for Adjo

Question

I need hep to figure out how mant kJ are in the reactants side and on the products side Ca(OH)2(s)+65.3kJ→CaO(s)+H2O(l)

Answer 1

Traditionally, all thermochemical equations are usually written so that the thermal effect of the reaction is indicated on the right side of the equation.

The given equation in canonical form should be written as follows:

$$Ca(OH)_2(s)= CaO(s) + H_2O(l) - 65.3kJ$$

From both forms of recording, it is obvious that the reaction is endothermic, that is, it proceeds with heat absorption.

So, we can say that for the reaction to take place, it is necessary to set 65.3 kJ of heat for the reactants, or that the products are formed when 65.3 kJ of heat are absorbed.