Question

an unknown solid is added to water in a calorimeter. the temperature of the water increases. what does this say about the reaction? answer: a the reaction is exothermic. b the reaction is endothermic. c the reaction has absorbed heat from the solution. d the reaction has released heat to the solution. e both a and d.

Explanation:

When the temperature of the water in the calorimeter increases, it means heat is being released into the water. An exothermic reaction releases heat (\(q_{reaction}<0\)), and this heat is absorbed by the solution (\(q_{solution}>0\)). So, the reaction is exothermic (A) and has released heat to the solution (D).

Answer:

E. Both A and D.