Determine reaction type from titration temperature change

Steps:

• Observe temperature change in conical flask during titration from diagram.
• If temperature decreases, reaction absorbs heat (endothermic).
• Recall ΔH sign: positive for endothermic, negative for exothermic.
• Match observation to choices, but diagram absent.

Why C is correct:

• Not enough information; diagram needed to confirm endothermic nature and ΔH sign, but C mismatches definition (endothermic requires ΔH positive).

Why the others are wrong:

• A: ΔH positive fits endothermic, but unconfirmed without diagram.
• B: Fits standard exothermic neutralization (ΔH negative), but diagram may show otherwise.
• D: ΔH positive contradicts exothermic definition.

Final answer: Not enough information.