The answer to 4 is A.
The answer to 5 is C.
88 Grams because the principal of conservation of mass states total mass in equals total out so 200 in 122+88=200 out
200 calories.
Explanation:
The (latent) heat of fusion of a material, is either one of:
1) the heat required to melt the material without
temperature change or
2) the heat removed from the material to freeze it
without temperature change.
For water this latent heat is 80 cal/g. Multiply this by
2.5 g to get 200 cal.
