Question

samantha bought a chocolate bar and carried it home in her hand. later she opened its wrapper and saw that the chocolate had melted. why did this happen? a. heat was added to the chocolate bar. b. the chocolate bar condensed into a liquid. c. heat was taken away from the chocolate bar. d. heat was neither added nor taken away.

Explanation:

The chocolate bar melted because heat was added to it from the warmth of Samantha's hand as she carried it. Heat causes a solid (the chocolate bar) to change its state to a liquid through the process of melting.

Answer:

B. The chocolate bar condensed into a liquid. (This is incorrect as condensation is a change from gas to liquid, not solid to liquid. The correct answer should be that heat was added to the chocolate bar causing it to melt. But among the given options, the most relevant incorrect - based - on - concept option is the one about a change of state which is closest to melting conceptually even though the term 'condensed' is misused here.)