Science extra questions
Answers
Yes this phenomenon is occurred due to latent heat. Here heating of water constantly doesn't rise the temperature above 100°C. Each time is found 100°C because of latent heat. Latent heat is that heat which doesn't rise the temperature of substance but it helps to change the state of matter. Here also after 100°C , the extra heat (latent heat) is working to change the liquid state of water to it's vapour state, that's why the temperature does not rises after 100°C.
Answer:
The temperature remains constant because -
• The liquid water turns into gaseous vapour during the boiling process. So,in this scenario,a change of the physical state is taking place.
• Now, for the above mentioned change of the physical state,a certain amount of energy is necessary which is known as the latent heat of evaporation.
• All the supplied heat during the boiling process is the latent heat of evaporation which is only capable to change the state of the substance. Changing the temperature of the substance is not a role of the latent heat of evaporation.
• That's why,the temperature remains constant throughout the whole boiling process.
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Explanation: