If we think of a beaker of water as the system and a hot plate as a source of heat then as heat flows from the hot plate (the surroundings) into the water (the system) the water molecules become more and more agitated, or &quot;energetic&quot; and ultimately the water boils.
(we; think then; of a beaker of water as the system and a hot plate as a source of heat) (heat; flows; from the hot plate; into the water) (the water molecules; become energetic; more and more agitated) (the water; boils; T:ultimately)
we heat the water molecules the water
think then flows become energetic boils
of a beaker of water as the system and a hot plate as a source of heat
from the hot plate into the water
more and more agitated
T:ultimately