Question: Hypothetical elements A 2 and B 2 react according to the following equation, forming the compound AB. A 2 (aq) + B 2 (aq)

Hypothetical elements A2 and B2 react according to the following equation, forming the compound AB.

A2(aq) + B2(aq) → 2AB(aq); ∆H° = +271 kJ/mol

If solutions A2(aq) and B2(aq), starting at the same temperature, are mixed in a coffee-cup calorimeter, the reaction that occurs is

a. Exothermic, and the temperature of the resulting solution rises.

b. Endothermic, and the temperature of the resulting solution rises.

c. Endothermic, and the temperature of the resulting solution falls.

d. Exothermic, and the temperature of the resulting solution falls.

e. Exothermic or endothermic, depending on the original and final temperatures.

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