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Coffee-Cup Calorimeter

APCHEM-UENYXL

Exactly 100. g of water at 20.0ºC is added to exactly 100. g of water at 40.0ºC in a coffee-cup calorimeter.

Which of the following provides the MOST likely prediction of the final temperature of the system and the reasoning behind that prediction?

A

The final temperature will be exactly than 30.0ºC. Energy must be conserved.

B

The final temperature will be exactly than 30.0ºC. Temperature must be conserved.

C

The final temperature will be less than 30.0ºC. Some heat loss to the surroundings is unavoidable.

D

The final temperature will be exactly 30.0ºC. The calorimeter is made of an insulating material, so the specific heat capacity of the calorimeter is greater than the specific heat capacity of the water, and the calorimeter will prevent loss of energy.