what is the enthalpy of reaction from the following energy diagram?

a. -20kj
b. + 20kj
c. +40kj
d. +60kj
e. +100kj

Answer : The correct option is, (a) -20 kJ

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

Enthalpy change : It is the difference between the energy of product and the reactant. It is represented as .

In an endothermic reaction, the energy of products are higher than the reactants energy. Thus, the change in enthalpy is positive.

In an exothermic reaction, the energy of products are lesser than the reactants energy. Thus, the change in enthalpy is negative.

From the given energy diagram we conclude that this is an exothermic reaction diagram.

Thus, the enthalpy of reaction is, -20 kJ

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

i believe it is c.) 1575 j.