Question

a reaction takes place in aqueous solution in a calorimeter. the water is: a the surroundings b the system c neither the system nor the surroundings d both the system and the surroundings

Explanation:

In thermochemistry, the system is the part of the universe being studied (the reaction in this case), and the surroundings are everything else. The water in the calorimeter absorbs or releases heat related to the reaction, so it is considered the surroundings.

Answer:

A. the surroundings