In the neutralization of a strong acid with a strong base, the essential reaction is the combination of H⁺(aq) and OH^-(aq) to form water.

Two solutions, 25.00 mL of 2.50 M HCl(aq) and 25.00 mL of 2.50 M NaOH(aq), both initially at 21.1 °C, are added to a Styrofoam-cup calorimeter and allowed to react. The temperature rises to 37.8 °C. Determine the heat of the neutralization reaction, expressed per mole of H₂O formed. Is the reaction endothermic or exothermic?

Transcribed Image Text:

H(aq) + OH(aq) H₂O(1)