# Question In an experiment, 10.0 g of ice at �20�C is con

Question

In an experiment, 10.0 g of ice at �20�C is converted into steam with a temperature of 110�C. How much energy is required for this process?
(DHvap = 2260 J/g; DHfus = 334 J/g; cs(ice) = 2.06 J/(g � �C); cs(water) = 4.18 J/(g � �C);
cs(steam) = 1.99 J/(g � �C))

a.

30.7 kJ

d.

30.3 kJ

b.

26.8 kJ

e.

38.7 kJ

c.

34.9 kJ

____ 9. A 15 g piece of iron (CP = 25.09 J/(mol � �C)) is heated to a temperature of 95�C and placed into a bucket containing 4.5 gal of water (CP = 75.38 J/(mol � �C)) initially at 25�C. Eventually,

a.

the water will be warmer than the iron.

b.

the iron will be warmer than the water.

c.

the iron will be colder than the water.

d.

the iron and the water will be at the same temperature.

e.

the temperature will be the average of 98�C and 25�C.

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