2. Heat changes during changes of state A. Boiling water (2.5 pts)
Water boils at 100 °C. You boil a pot containing 500 g of water for 10 minutes.
What is the temperature of the water after 10 minutes of constant boiling? (hint this question
does not require any math).
Explain or justify your answer by discussing heat and state change.
B (2.5 pts) Boiling off a pot of water
A pot containing 500 g of water is brought to a boil. The later heat of vaporization is for water H=2260 kJ/kg
How much heat will it take to completely boil the water (turn it all to steam) of water is brought to a boil.

A) it remains at a 100 B) 1130J

Explanation:

A) Water boils at a hundred after which further heat is used up to break bonds in order to allow water to boil rather than being used up to increase the temperature of the water that is boiling.

B) Energy/heat = specific latent heat x mass

E = 2260 x 0.5 (kg)

E = 1130 J

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.