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.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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