How can the effect of heat on a reaction be determined? A. Heat always shifts a reaction toward product formation.
B. Heat always shifts a reaction toward reactant formation.
C. Heat will increase reaction rate, but not equilibrium position.
D. Heat is treated as a reactant or a product.

D. Heat is treated as a reactant or a product

Explanation:

The effect of heat on a reaction be determined when heat is treated as a reactant or a product.

In this case, if heat is the reactant, it'll be the substance that will undergo a change during the reaction. It should be noted that reactant is present at the beginning of a chemical reaction.

On the other hand, as the product, heat will be present when the chemical reaction is completed. Therefore, the correct option is D.

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