
Concept explainers
Interpretation: Indication of heat of formation of metals needs to be explained.
Concept Introduction: Exothermic reactions are best source of energy. Exothermic reaction discharges energy into the surrounding from the system.

Answer to Problem 2E
The energy discharge when one mole of a compound is formed from elements is called the heat of formation. If the
Explanation of Solution
Oxidation reactions are good source of energy because they are always exothermic. Heat of formation is denoted by symbol
The heat of formation value of Magnesium oxide is
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