Question

A sample of cold water was mixed with a sample of hot water inside a calorimeter, and 13,160 joules of heat energy were absorbed by the cold water. Which statement is true about the hot water in the calorimeter?

A. It released 26,320 joules.
B. It released 13,160 joules.
C. It absorbed 26,320 joules.
D. It absorbed 13,160 joules.

Answer 1

Answer: Option (B) is the correct answer.

Step-by-step explanation:

Two bodies of different temperature when come in contact with each other then heat is transferred from hot body to cold body until a thermal equilibrium is maintained between them.

So, when a sample of hot and cold water are mixed together then energy will be released by hot water which is actually absorbed by the cold water till temperature of both the liquids become equal.

Hence, when hot water has 13,160 joules of energy then this energy will be absorbed by a sample cold water. This means that hot water has released 13,160 joules of energy.

Hence, we can conclude that the true statement about the hot water in the calorimeter is that it released 13,160 joules.

Answer 2

B. It released 13,160 joules.

Step-by-step explanation:

• It is known that when mixing hot water with cold water at equilibrium:

The amount of heat released from hot water = the amount of heat absorbed by cold water.

∵ 13,160 joules of heat energy were absorbed by the cold water.

∴ The hot water release 13,160 joules.

So, the right choice is: B. It released 13,160 joules.