The Reaction That Represents the Standard Enthalpy of Formation for Acetone

question 75

Multiple Choice

The reaction that represents the standard enthalpy of formation for acetone (CH₃COCH₃) , a common ingredient in nail polish remover is:

• A) 3 C(graphite) + 3 H₂(g) + ½ O₂(g) \(\rarr\) CH₃COCH₃(l)
• B) 6 C(diamond) + 6 H₂(g) + O₂(g) \(\rarr\) 2 CH₃COCH₃(l)
• C) 3 C(diamond) + 3 H₂(g) + ½ O₂(g) \(\rarr\) CH₃COCH₃(l)
• D) CH₃COCH₃(l) \(\rarr\) 3 C(graphite) + 3 H₂(g) + ½ O₂(g)
• E) CH₃COCH₃(l) + 4 O₂(g) \(\rarr\) 3 CO₂(g) + 3 H₂O(g)

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Definitions:

P Orbitals

Atomic orbitals described by quantum mechanics having a dumbbell shape and oriented along the x, y, and z axes, involved in forming pi bonds.

Relative Energies

Comparative measure of the energy levels of molecules in different states or configurations.

π Molecular Orbitals

Orbitals formed by the overlap of p-orbitals across adjacent atoms, involved in pi bonding, crucial for the understanding of conjugated systems.

Occupied π Molecular Orbitals

π molecular orbitals that contain electrons; they are involved in bonding between atoms and are crucial for understanding the reactivity of molecules.