Blog 9.1 Heat Of Fusion ( Delta H) Using Table I

1. My solution was Endothermic because the water got cold, so the energy flew from the air to the water with the solution.

2. The Possible source of errors could have been that the water got so hot that some evaporated, so since some evaporated it probably affected the mass.

3. If the room temperature was 10degree colder, i don't think i was going to affected the number of moles because the water wasn't going to evaporated which would keep the mass the same.

    Enrichment:

   Farmers spray water on the oranges so they can freeze them to prevent damage. When water freeze it turns into ice, heat is released through the heat of fusion. A gallon of water releases about 300kcal of heat as it freezes. However water is also evaporating in the atmosphere.The evaporation of water cause a loss of about 2,300kcal per gallon of water evaporated. Therefore to provide heat to the orchard, more water must freeze than evaporates.So 7.5 times water must freeze more than that which evaporates.