Calculate ∆h0 for the following reaction. br2(
g. → br2(l)∆hf0 br2(
g. =30.91 kj/mol; ∆hf0 br2 (l) =0 kj/mol)

From the balance chemical reaction, it can be seen that a gaseous bromine is converted to liquid bromine. The heat of reaction is equal to the heat of the product minus the heat of the reactant. Following this, the Δhf0 is equal to,
                                       Δhf0 = (0 kJ/mol) - (30.91 kJ/mol)
                                            Δhf0 = -30.91 kJ/mol

What do you mean by that? like the contents? the thc level?

Answer:

a. energy is absorbed in the reaction.

explanation:

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.