CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
In energy analyses, which of the following best defines a "system"?
(a) Any group of objects whose total external force is zero, so their total energy stays constant
(b) Only the object of interest, excluding any other objects it interacts with
(c) The portion of the universe whose energy changes are being tracked, separated from everything else by an imagined boundary
(d) Everything that happens to lie inside the laboratory where the experiment is performed