A student had 50.0 grams of frozen alcohol and placed it in a beaker on a hot plate. The
student noted that for the first two minutes, the temperature of the alcohol in the beaker did
not change. By the end of the two minutes most of the alcohol was in the liquid state. Explain
how this could happen using the concepts of temperature, kinetic energy, and potential
energy.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

thats how its supposed to be