Ankush
- Rate PKR 2,842
- Response 1h
PKR 2,842/hr
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- Chemistry
- Natural Sciences
- Biochemistry
- Food chemistry
Think like a proton and stay positive! If u r not a part of solution u r a part of precipitate!
- Chemistry
- Natural Sciences
- Biochemistry
- Food chemistry
Lesson location
About Ankush
My specialisation is specialist & executive search in the chemical, food & pharmaceutical industries. I enjoy the creation of career paths for professionals with a degree in (bio)chemistry; chemical engineering or alike. Besides the obvious routes such as a career in science, engineering or management, I found that the career of someone with a background in chemistry can develop in truly surprising, exciting and different ways.
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About the lesson
- Primary
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- +8
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- English
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English
Typically, when something is cold, it shrinks. That’s because temperature describes atomic vibration — the more vibration, the more space it takes, hence expansion. Water is an exception. Even though it vibrates less when it’s frozen, the ice occupies more volume. That’s due to the strange shape of the water molecule.
If you remember your Chemistry 101, the water molecule looks like Mickey Mouse, the oxygen atom sitting at the center (the face) and two hydrogen atoms each at an angle (Mickey’s ears). Because of how oxygen and hydrogen bond, the water molecule is an open structure with a lot of space. When water freezes it releases energy because a lot of extra strong bonds can be made. But it does take up more space. And so, ice expands when it freezes. Another interesting fact worth mentioning is that hot water freezes faster than cold water.
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- PKR 2,842
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- 5h: PKR 10
- 10h: PKR 20
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- PKR 2,842/h
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