The mixture in the large beaker still looked clear like water, but when the students, one at a time, carefully touched the outside of the
large beaker, it felt warm to the touch.
Why did the large beaker most likely feel warm?
A. The energy of mixing warmed the liquids.
B. The two liquids were not soluble in water.
C. The release of a gas heated the solution.
D. A chemical reaction produced a new substance.