Question
Is oxidation an exothermic or an endothermic reaction?
$\text{C(s)}\ +\ \text{O}_2(\text{g})\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{CO}_2(\text{g})$
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$\text{Ca}\ +\ \text{H}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{CaOH}\ +\ \text{H}$