Latent Heat
Latent Heat
Latent Heat Of Vaporisation:
The latent heat of vaporisation of a substance is defined as the quantity of heat gained by 1 kg of the substance in changing from liquid to vapour state or from vapour to liquid state at constant temperature.
When you heat a liquid, its molecules start moving faster and gain kinetic energy. This shows as a rise in its temperature. At the boiling point, however, the heat supplied is used by the molecules to break away from the inter-molecular force and change into vapour molecules, rather than to move faster.This is why there is no change in the temperature. The heat required to help the molecules of liquid to overcome the inter-molecular forces and to escape as a vapour molecules is known as the latent heat of vaporisation.
Latent Heat Of Fusion:
The latent heat of fusion is defined as the quantity of heat gained by 1 kg of substance in changing from the solid to liquid at same temperature.
Which of he following are correct ? (a) Heat required to help the molecules of liquid to overcome the inter-molecular forces and to escape as a vapour molecules is known as the latent heat of vaporisation. (b) When we heat a liquid, its molecules start moving faster and gain kinetic energy. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct ? (a) The latent heat of vaporisation of a substance is defined as the quantity of heat gained by 1 kg of the substance in changing from liquid to vapour state . (b) The latent heat of fusion is defined as the quantity of heat gained by 1 kg of substance in changing from the solid to liquid . (c) At the boiling point the heat supplied is used by the molecules to break away from the inter-molecular force and change into vapour molecules. | |||
| Right Option : D | |||
| View Explanation | |||
The heat required to help the molecules of liquid to overcome the intermolecular forces and to escape as a vapour molecules is known as the _______________________ . | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
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Aman Kumar Shrivastava
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Shreya Shrivastava
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Yogansh Nyasi
7thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
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Hridey Preet
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Shivam Rana
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Sharandeep Singh
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Anika Saxena
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Cheshta
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Ayan Ghosh
8thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
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Aman Kumar Shrivastava
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
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8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
