Đun 12 gam axit axetic với etanol dư (có H2SO4 đặc làm xúc tác) đến khi phản ứng đạt trạng thái cân bằng, thu được 13,2 gam este. Hiệu suất của phản ứng este hoá là

the answer is b. dilution

a. energy is absorbed in the reaction.

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.