Question

Charles was given an unknown sample to place inside a coffee cup calorimeter. He measured the initial temperature of the water, and the final temperature after the sample had been added. The temperatures are listed below:


Initial Temperature = 24oC


Final Temperature = 26oC


Select TWO statements that describe energy or matter for this reaction in the coffee cup calorimeter system.






A.
The reaction caused energy to be released into the surrounding water.

B.
The reaction absorbed energy from the surrounding water.

C.
Before the reaction begins, the water and the sample are present in different states of matter.

D.
The temperature measurement describes the average potential energy of the particles of matter in the cup system

Answer 1

A. The reaction caused energy to be released into the surrounding water.

B. The reaction absorbed energy from the surrounding water.