How much heat is released at constant pressure if 12.3 mL of 0.161 M silver nitrate is mixed with 41.7 mL of 0.493 M potassium chloride?
AgNO₃(aq) + KCl(aq) → AgCl(s) + KNO₃(aq) ; ΔH° = -65.5 kJ

Question

How much heat is released at constant pressure if 12.3 mL of 0.161 M silver nitrate is mixed with 41.7 mL of 0.493 M potassium chloride? AgNO₃(aq)+ KCl(aq)→ AgCl(s)+ KNO₃(aq); ΔH° = -65.5 kJ

Quizplus · Accepted Answer

The limiting reactant is AgNO3, with 0.00198 moles. The heat released is calculated using ΔH° and the moles of the limiting reactant: 0.00198 moles * (-65.5 kJ/mol) = -0.12969 kJ, which rounds to 0.129 kJ.

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