Question

question 10 of 25
which energy profile best shows that the enthalpy of formation of cs₂ is 89.4 kj/mol?
a. energy profile b
b. energy profile c
c. energy profile d
d. energy profile a

Explanation:

Step1: Understand endothermic reaction

An enthalpy of formation of 89.4 kJ/mol is positive, indicating an endothermic reaction. In an endothermic reaction, the products have higher energy than the reactants.

Step2: Analyze energy - profiles

Energy - profile A is a typical endothermic reaction profile where the energy of the products is higher than that of the reactants. Profile B is an exothermic reaction (products have lower energy). Profile C is a reaction with an intermediate and overall energy change is not consistent with endothermic nature for formation. Profile D is not a typical formation - reaction profile as it has a decrease in energy after the peak which is not relevant for a simple formation reaction.

Answer:

D. Energy profile A