Question

a student redid the experiment of mixing room - temperature water and warm water. this time, she doubled the amount of room - temperature water. how will the final temperature be different? a. it will be higher, because the amount of water in the mixture is greater. b. it will be higher, because all parts of the mixture will end up at the same temperature. c. it will be lower, because the temperature of the room - temperature water will not increase as much. d. it will be the same, because all parts of the mixture will end up at the same temperature.

Explanation:

When mixing two substances (here room - temperature water and warm water), the final temperature is determined by the principle of conservation of energy (heat transfer). Doubling the amount of room - temperature water means it can absorb more heat from the warm water. So the final temperature will be lower as the room - temperature water will not allow the temperature to increase as much as before.

Answer:

C. It will be lower, because the temperature of the room - temperature water will not increase as much.