please explain and solve question # 1 and # 4How

much heat must be added to 5

0.0 g of water to raise the

temperature of

the water from

5.0

ºC to 78.6

ºC?

The molar heat o

f solution of a substance is found to be 14.7

kJ/mole. The

addition of 0.125

mol of this substance

to 0.100 L water initially at 25

.0ºC

results in a temperature

de

crease

. Find the final temperature of the solution.

Assume that the specific heat of the s

olution to be equal to that of pure water.

The heat capacity of the calorimeter is

95 J/ ºC

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