Which term describes this reaction? ch3br(aq) + oh-(aq) -> ch3oh(aq) + br-(aq)
a. addition
b. condensation
c. elimination
d. substitution

d. substitution

Explanation:

This is an example of nucleophilic substitution as one nucleophile replaces or substitutes another nucleophile.

Addition reaction involves addition of reactants.

Condensation is a reaction in which reactants add together to give a product along with the release of a small byproduct.

Elimination is a reaction in which a small molecule gets eliminated from a reactant.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.