The total enthalpy of the products in a reaction is 0 kJ, and the total enthalpy of the reactants is 100 kJ. What is the ΔH for the reaction? Choose the correct answer. a.–393.5 kJ
b.–100 kJ
c.0 kJ
d.+100 kJ

b. -100 kJ

Explanation:

Heat of reaction is the energy released or absorbed during the course of the reaction. It is represented by the symbol .

= enthalpy of reaction = ?

= enthalpy of products = 0 kJ

= enthalpy of reactants = 100 kJ

Thus the ΔH for the reaction is -100kJ

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."