Question

question 2 (1 point)
use the following information to answer the next question.
when placed in acid, magnesium metal reacts and
forms hydrogen gas:
mg(s) + hcl(aq) --> mgcl₂(aq) + h₂(g) δh = -56.5
kj/mol
if hp denotes the enthalpy of products and hr denotes the enthalpy of reactants,
then
hp > hr
hp < hr
hp = hr
hp ≥ hr
impossible to tell from given data

Explanation:

The formula for enthalpy change is $\Delta H=H_p - H_r$. Given $\Delta H=- 56.5\ \text{kJ/mol}$ (negative value, indicating an exothermic reaction). Substituting into the formula: $-56.5 = H_p - H_r$. Rearranging gives $H_p=H_r - 56.5$. So, $H_p

Answer:

$H_p < H_r$