Question

Which statement is true if the hrxn of a reaction is positive

Answer 1

If the Hrxn of a reaction is positive then the reaction is endothermic reaction. In an endothermic reaction, heat is absorbed by the chemical reaction from the surrounding.

Reactants + heat --> Products

In the activation energy diagram the heat of the products is greater than the heat of the reactants in an endothermic reaction.

Answer 2

Answer : The reaction is endothermic in nature.

Explanation : A system of reactants which absorbs heat from the surroundings in an endothermic reaction has a positive ΔH reaction value, as the enthalpy of the products is higher than the enthalpy of the reactants of the system.

As the enthalpies of these reactions are greater than zero, they are called as endothermic reactions. Which absorbs the heat during the chemical reactions.