Interpretation: The exception among a group of elements is to be found out.
Concept introduction: The standard enthalpy of formation is the amount of energy released or consumed when one mole of a substance is formed under standard conditions from its pure elements.
Standard conditions of temperature and pressure are
Answer to Problem 75A
The exception among the given elements is
Explanation of Solution
The standard enthalpy of formation for any free element in its standard
Thus, the exception is
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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