A professor gave a student the following data regarding the determination of the

Question

A professor gave a student the following data regarding the determination of the heat of fusion of ice experiment:
Volume of room temperature water was 300 mL; however, the student forgot to determine the Tinitial of the room temperature water but the Tfinal was recorded as 7.3 oC.
The volume of the cold water was 51 mL and the Tfinal, of course, was 7.3 oC.
So the student was told to use the Hfusion for ice to be 299 J/g of ice. The density of water is 1.000 g/ 1 mL and the specific heat capacity of water is 4.186 J/g oC.


Use the above information to calculate the T (Tfinal - Tinitial) of the room temperature water and the initial temperature, Tinitial, of the room temperature water in that order (oC.)! Choose one of the following:

Select one:

a. -13.5, 21.2

b. 13.3, 20.6

c. -10.8, 21.1

d. 7.3, 21.0

e. -13.3, 20.6

f. 13.5, 21.2

Explanation / Answer

Given:

dT = Tf - Ti

So,

Tf = dT + Ti

Given:

Tf = 7.3

So,

dT + Ti = 7.3

The correct option is the one whose pair adds up to give 7.3

From all the options given, the only optio satisfying this equation is (e)

So correct asnwer is:

e. -13.3, 20.6

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