Physics, asked by artikapse556, 5 months ago

2. Why is cooling faster in the calorimeter painted black?​

Answers

Answered by Anonymous
12

Answer:

Beaker whose surface is printed black will cool first because according to Kirchhoff's law of radiation, black-body is good emitter of heat, hence black container will cool down faster

Answered by HappyJohn
2

Cooling is faster in the calorimeter painted black because body that is black is good heat emitter.

Explanation:

1. Calorimeter is actually a device which is used to measure heat produced during reaction which may be mechanical, electrical or chemical.

2. This device is also used to calculate or to determine the heat capacity of substances or materials.

3. We can observe that cooling is faster in calorimeter that is painted black. This can be explained by Kirchoff's law of radiation which states that black painted bodies are good heat emitters. Hence, black bodies cools faster.

4. The reason is that the bodies that are dark colored absorb visible light better than those of light colored bodies. So, the dark bodies heats up faster. Also, the dark bodies are able to emit radiation more faster than those of light colored materials and therefore, they cool faster.

5. Black bodies has the ability to absorb all the wavelengths of light and does not reflect any of these wavelengths.

LEARN MORE:

State three factors on which radiation rate depends:

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A black body at 1100 oc surrounding at 200oc find heat loss per unit area by radiation.

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