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Examine the chemical equation and statement.
Mg+2HCl⇌MgCl2+H2
The reaction is at equilibrium. The forward reaction is endothermic, and the reverse reaction is exothermic.
Given a decrease in temperature, how would the reaction shift?

a. A decrease in temperature will cause the reaction to shift toward the endothermic reaction, which has the reactants MgCl2 and H2.
b. A decrease in temperature will cause the reaction to shift toward the endothermic reaction, which has the reactants Mg and HCl.
c. A decrease in temperature will cause the reaction to shift toward the exothermic reaction, which has the reactants Mg and HCl.
d. A decrease in temperature will cause the reaction to shift toward the exothermic reaction, which has the reactants MgCl2 and H2.

Respuesta :

Answer:

d

Explanation:

the endothermic reaction absorbs heat and exothermic emits heat. If we think of this from increasing the temperature, exothermic already emits heat so it would favor an endothermic reaction. In this instance, a decrease in temperature would do the opposite, which would favor the exothermic reaction.

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