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Sublimation

Posted on by Mrs Shilpi Nagpal

Question 1 What is sublimation.

Question 2 Define sublimate.

Question 3 Define sublime.

Question 4 Give few examples of substances that undergoes sublimation ?

Question 5 Why naphthalene balls kept in stored clothes in our homes disappear over a period of time ?

Question 6 How does applying pressure help in the liquefaction of a gas ?

Question 7 What is the effect of pressure on change in state of matter?

Question 8 What is solid carbon dioxide?

Question 9 Why solid carbon dioxide is called dry ice ?

Sublimation

sublimation

sublimation

The Changing of a solid directly into vapours on heating,and of vapours into solid on cooling is called as sublimation.

The solid substance which undergoes sublimation is called sublime.

The solid obtained by cooling the vapours of the solid called a sublimate.

For Ex:camphor,Iodine,Ammonium Chloride,Naphthalene etc.

Effect of Change of Pressure
The physical state of matter can be changed by increasing or decreasing the pressure.When a high pressure is applied to a gas,it gets compressed and when we lower its temperature,it gets liquified.Gases can be liquified by compression and cooling.

For Ex:Solid carbon dioxide is stored under high pressure.This is because on decreasing the pressure on solid carbon dioxide,it gets converted directly into carbon dioxide gas

About Mrs Shilpi Nagpal

Mrs. Shilpi Nagpal is a post-graduate in Chemistry and an experienced tutor who has been teaching students since 2007. She specialises in tutoring science subjects for students in grades 6-12. Mrs. Nagpal has a proven track record of success, and her students have consistently achieved better grades and improved test scores. She is articulate, knowledgeable and her passion for teaching shines through in her work with students.

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