Water can exist in three states of matter. Imagine examining the changes of state from solid to liquid to gas by adding
to ice. What would change or not change?
As water changes state, the mass of the sample.
The size of the water molecules.
. However, the
of the water molecules does change during a change in state. The
evidence that supports this conclusion is that the volume of the sample changes.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )