Cooler objects able to increase the temperature of warmer objects?

Thread starter JR Wakefield
Start date Nov 25, 2017
Tags

Cooler increase Temperature

In summary: It is clear reading the comments that people do not understand the difference between energy, heat and temperature. One person even objected to the official definition of heat!In summary, it is claimed that a colder object can keep a warmer object warmer by exchanging radiation, but this is not supported by the article.

Dec 1, 2017

bob012345

Gold Member

berkeman said:

Can you show that calculation? Or otherwise show where you got the 300W/m^2 number that you posted?

Assuming 20C surface temperature and an emissivity of around .9, that's 293K so using the Stephan Boltzmann law we have

8.67 10^-8 W/(m^2 K^4) * 293K^4 * 0.9 which is about 376 W/m^2 which is over the 300 W/m^2 number which was an estimate of the average.

<h2>1. How is it possible for a cooler object to increase the temperature of a warmer object?</h2><p>The increase in temperature of a warmer object by a cooler object is due to the transfer of thermal energy from the cooler object to the warmer object. This is known as heat transfer and it occurs until both objects reach thermal equilibrium.</p><h2>2. Can any cooler object increase the temperature of a warmer object?</h2><p>Yes, any cooler object has the ability to increase the temperature of a warmer object. The rate of temperature increase depends on the difference in temperature between the two objects and the material properties of the objects.</p><h2>3. Is this phenomenon related to the laws of thermodynamics?</h2><p>Yes, this phenomenon follows the laws of thermodynamics, specifically the second law which states that heat transfer occurs from a hotter object to a cooler object until both reach thermal equilibrium.</p><h2>4. How does the temperature of the cooler object change after it has increased the temperature of the warmer object?</h2><p>The temperature of the cooler object decreases as it transfers thermal energy to the warmer object. The amount of decrease depends on the initial temperature of the cooler object and the amount of thermal energy transferred.</p><h2>5. Can this phenomenon be observed in everyday life?</h2><p>Yes, this phenomenon can be observed in everyday life. For example, when a cold drink is left outside on a hot day, the drink will eventually reach the same temperature as the surrounding air. This is because the thermal energy from the warmer air is transferred to the cooler drink, causing an increase in its temperature.</p>

1. How is it possible for a cooler object to increase the temperature of a warmer object?

The increase in temperature of a warmer object by a cooler object is due to the transfer of thermal energy from the cooler object to the warmer object. This is known as heat transfer and it occurs until both objects reach thermal equilibrium.

2. Can any cooler object increase the temperature of a warmer object?

Yes, any cooler object has the ability to increase the temperature of a warmer object. The rate of temperature increase depends on the difference in temperature between the two objects and the material properties of the objects.

3. Is this phenomenon related to the laws of thermodynamics?

Yes, this phenomenon follows the laws of thermodynamics, specifically the second law which states that heat transfer occurs from a hotter object to a cooler object until both reach thermal equilibrium.

4. How does the temperature of the cooler object change after it has increased the temperature of the warmer object?

The temperature of the cooler object decreases as it transfers thermal energy to the warmer object. The amount of decrease depends on the initial temperature of the cooler object and the amount of thermal energy transferred.

5. Can this phenomenon be observed in everyday life?

Yes, this phenomenon can be observed in everyday life. For example, when a cold drink is left outside on a hot day, the drink will eventually reach the same temperature as the surrounding air. This is because the thermal energy from the warmer air is transferred to the cooler drink, causing an increase in its temperature.