Calculate the change in enthalpy (LaTeX: \DeltaΔH) of a reaction with the following information:

Energy of Reactants = 129 kJ

Energy of the Products = 110 kJ

Energy of the Transition State = 198 kJ

-19 kJ

Explanation:

The change in enthalpy is mathematically expressed as the difference between the the total potential energy of products and the potential energy of the reactants :

Where:

Then:

The negative sign in this result means we have a negative enthalpy, hence an exothermic reaction (where heat is released).

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

they are all solids.