What substance is classified as an arrhenius base

Explanation:

According to Arrhenius concept:

A base is defined as a substance which donates hydroxide ions when dissolved in water. For example: sodium hydroxide (NaOH), potassium hydroxide (KOH).

An acid is defined as a substance which donates hydronium ions in water.For example: hydrogen chlorde (HCl), nitric acid ().

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.