Heat of Fusion of Ice and Heat of Vaporization of Water (1 pt) Why do you need t

Question

Heat of Fusion of Ice and Heat of Vaporization of Water (1 pt) Why do you need to be careful to dry the ice before adding it to the water in Part B? 1. 2. (2 pts) How much energy is needed to melt 35g of ice at 0 °C to turn it into water at 0 °C? Show your calculations) 3. (2 pts) How much energy is needed to increase the temperature of 35g of water from 0 °C to 20 ?? (Show your calculations) in order to 4. (1 pt) What is the mass of water at 40°C that would need to be cooled to 20°C provide enough energy for questions 2 and 3 combined? (Show your calculation)

Explanation / Answer

1. because if ice is wet that means it have both ice and water.

ice and water have different thermal properties.

so we need to dry the ice.

2. Q = m Lf

Q = (35 g) (334 J/g)

Q = 11690 J  

3. Q = m C deltaT

Q = (35)(4.184)((20 - 0)) = 2929 J  

4. Q_total = 2929 + 11690 = 14619

and 14169 = (m)(4.184)((40-20))

m = 175 gram

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