2. How many joules of heat are required to heat 237 g of lithium fluoride (specific heat = 1.56 joules/g®) from 21.3°C to 44.5°C? *
(1 Point)
350,439.10 joules
8,577.50 joules
24,327.58 joules
6.55 joules

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.