Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

What is the standard enthalpy of formation of an element in its most stable form?
Options
A Positive and varies with temperature.
B Zero.
Correct Answer
C Always negative.
D Equal to its bond dissociation energy.
Correct Answer

Option B is the correct answer.

Detailed Explanation

By definition, the standard enthalpy of formation (ΔH°f) of an element in its most stable form under standard conditions is zero. This sets a reference point for calculating enthalpy changes for compounds.

Hint

This is a fundamental convention in thermochemistry. What is the reference value for the most stable form of an element?

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 284 of 1872
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