Evaporation causes cooling
Evaporation causes cooling
Evaporation: conversion of a liquid into its vapour either by exposing the liquid to air at the room temperature or by heating it below its boiling point is called ‘evaporation.’ For example: take common salt or sodium chloride in a porcelain dish and place it on water bath. After some time, the water from the porcelain basin has evaporated, leaving behind sodium chloride as residue.
Explanation for the process of evaporation: As the particles of liquid are constantly moving, they collide with each other. They also collide with particles of air when left exposed. In doing so, some of the particles at the surface of the liquid acquire extra energy and overcome the intermolecular forces of attraction that pull them back and keep them with the bulk of the liquid. These highly energetic particles leave the surface and go into vapour.Evaporation causes cooling: when the surface particles take up energy and escape into air as gas. This results in fall of temperature of liquid. The liquid is thus cooled.
Before the doctor gives an injection, he applies spirit at that site. At that time our skin feels very cool because : | |||
| Right Option : A | |||
| View Explanation | |||
During evaporation, particles of a liquid change to vapours only ____________________ | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following statement (s) about evaporation is/are correct? | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy 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
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas 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
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy 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
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
