What Is the Value of ΔH in Kcal/mole for the Reaction

question 10

Multiple Choice

What is the value of ΔH in kcal/mole for the reaction shown? (CH₃) ₃C-H + Cl-Cl → (CH₃) ₃C-Cl + H-Cl
Bond energies are: (CH₃) ₃C-H = 91 kcal/mole
(CH₃) ₃C-Cl = 78.5 kcal/mole
Cl-Cl = 58 kcal/mole
H-Cl = 103 kcal/mole

• A)+32.5
• B)-57.5
• C)-32.5
• D)+57.5
• E)-8.5

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Definitions:

Formal Charge

Used to calculate the charge of an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms.

Nitrogen

A chemical element with symbol N and atomic number 7, essential for life and a major component of the Earth's atmosphere.

Electron Configuration

The arrangement of electrons within the orbitals of atoms or molecules.

Phosphorus

A highly reactive, nonmetallic element essential for life, used in fertilizers, detergents, and many other products.