Ultimately, thermoses To retain the heat inside is used. How logical can it be that hot or cold is a step ahead?

Bride, answers to these questions Let’s give it.

The answer to this question is related to heat transfer.

In short, the greater the temperature difference between two objects, the greater the energy transfer between them. the faster the transition from hot to cold. In fact, our perception of hot and cold can also give us the answer to this question.

Let’s assume the room temperature is 21°C. Water freezes at 32°C and boils at 100°C. For this reason, the difference between the room temperature and the thermos of an iced drink is the difference between the room temperature and the temperature of a hot meal taken from the stove. It is much smaller than the difference between the thermoses.

Additionally, a significant amount of heat transfer occurs every time you open the thermos.

So your coffee gets cold or your water gets hot. However, due to the larger temperature difference, there is a difference between coffee and cold air. More energy will be transferred. Due to the smaller temperature difference, much less energy will be transferred between the cold water and the warmer air.

This is where human perception comes into play. The temperature change in coffee We will be more aware of the temperature change in water. In this case, we think that thermoses keep cold drinks cold much better than hot drinks warm.

However, given the percentage of heat energy transferred, thermoses are equally effective at both ends of the temperature spectrum.

That’s why thermoses seem to be more effective at keeping things cold than keeping them warm. is our perception of temperature change. A cold drink is much closer to room temperature when it is prepared significantly hotter than room temperature, such as coffee and soup.

As heat transfer occurs, hot fluids change We become more aware of the difference in heat energy.

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