During an exothermic reaction, δh for the reactants was 890 kj/mol. which of the following statements is correct about the δh for the products?

a. it is less than 890 kj/mol because the amount of energy required to break bonds is less than the amount of energy released in forming bonds.

b. it is less than 890 kj/mol because the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.

c. it is greater than 890 kj/mol because the amount of energy required to break bonds is less than the amount of energy released in forming bonds.

d. it is greater than 890 kj/mol because the amount of energy required to break bonds is greater than the amount of energy released in forming bonds.

The correct answer is Option A.

Explanation:

Endothermic reactions are defined as the chemical reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system. The total enthalpy of the reaction comes out to be positive.

Exothermic reactions are defined as the chemical reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system. The total enthalpy of the reaction comes out to be negative.

When in the formation of new bonds, more energy is released than the energy is required to break the existing bonds, then the heat is released and the reaction is exothermic in nature.

When in the formation of bonds, less energy is released than the energy is required to break the existing bonds, then the heat is absorbed and the reaction is endothermic in nature.

We are given:

An exothermic reaction in which energy of the reactants is 890 kJ/mol. In this process, the energy is getting released.

Hence, the correct answer is Option A.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

since electrons are negative the answer is neagtaive