Answer
The answer is below.
Work Step by Step
The solution should be the system, for this is what we are studying. While the whole universe is technically the surroundings, we can approximate the surroundings to be the beaker.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.