Question
On a cold day, Kiera brought two thermoses of hot chocolate outside. The amount of hot chocolate in each thermos was the same, but one thermos was larger than the other. This table shows how the temperature of each hot chocolate changed over
2
hours
.
Hot chocolateInitial temperature
(
°C
)
Final temperature
(
°C
)
Hot chocolate in the smaller thermos9364Hot chocolate in the larger thermos9560
The next time Kiera brings hot chocolate outside, she does not want it to cool down quickly. What should she do to minimize the rate of thermal energy transfer out of the hot chocolate?
put the hot chocolate in the smaller thermos
put the hot chocolate in the larger thermos
either; the rate of thermal energy transfer is the same whether the hot chocolate is in the smaller or larger thermos
Submit



2
hours
.
Hot chocolateInitial temperature
(
°C
)
Final temperature
(
°C
)
Hot chocolate in the smaller thermos9364Hot chocolate in the larger thermos9560
The next time Kiera brings hot chocolate outside, she does not want it to cool down quickly. What should she do to minimize the rate of thermal energy transfer out of the hot chocolate?
put the hot chocolate in the smaller thermos
put the hot chocolate in the larger thermos
either; the rate of thermal energy transfer is the same whether the hot chocolate is in the smaller or larger thermos
Submit



Answers
Answered by
GPT-4o mini
To minimize the rate of thermal energy transfer out of the hot chocolate, Kiera should put the hot chocolate in the larger thermos.
The larger thermos has a greater volume and typically a thicker insulation (depending on the design), which can help retain heat more effectively than a smaller thermos. This is evident from the data: the hot chocolate in the larger thermos cooled down less (from 95°C to 60°C) compared to the hot chocolate in the smaller thermos (from 93°C to 64°C).
Therefore, the best option for Kiera to minimize cooling is to:
**put the hot chocolate in the larger thermos.**
The larger thermos has a greater volume and typically a thicker insulation (depending on the design), which can help retain heat more effectively than a smaller thermos. This is evident from the data: the hot chocolate in the larger thermos cooled down less (from 95°C to 60°C) compared to the hot chocolate in the smaller thermos (from 93°C to 64°C).
Therefore, the best option for Kiera to minimize cooling is to:
**put the hot chocolate in the larger thermos.**