Or if you need more Intermolecular Forces practice, you can also practice Intermolecular Forces practice problems. If you forgot your password, you can reset it. Join thousands of students and gain free access to 46 hours of Chemistry videos that follow the topics your textbook covers. Analytical Chemistry Video Lessons. Cell Biology Video Lessons. Genetics Video Lessons.
Biochemistry Video Lessons. GOB Video Lessons. Microbiology Video Lessons. Calculus Video Lessons. Statistics Video Lessons. Hydrogen atoms are attracted to other atoms such as oxygen atoms, because the electrons are pulled closer to the oxygen atom, due to its greater attraction for electrons. As a result the oxygen atom has a slightly negative partial charge and the hydrogen atoms have a slightly positive partial charge.
The slightly positively charged hydrogen atoms are then attracted to the slightly negatively charged oxygen atoms of other water molecules. These forces of attraction are called hydrogen bonds. The forces holding two molecules together in a hydrogen bond are much stronger than those between molecules and hydrocarbons. The attraction between hydrogen and oxygen atoms results in a much higher boiling point of water than anticipated for a different molecule with the same mass.
Hydrogen bonds can also be formed between atoms of hydrogen and sulphur or nitrogen , typically SH- and NH2- groups. In this picture you can see what hydrogen bonds in water look like: Hydrogen bonds.
To make water evaporate, energy has to be added. The water molecules in the water absorb that energy individually. Due to this absorption of energy the hydrogen bonds connecting water molecules to one another will break. The molecules are now in the gaseous state; this is called water vapour. The phase change from liquid to vapour is called evaporation.
During evaporation a molecule of water absorbs latent heat. Thermal properties of a liquid are properties that have everything to do with heat transfer through this liquid. Thermal properties can be divided up into specific heat and latent heat. The specific heat is the amount of heat per unit mass that is required to raise the temperature of a liquid by one degree Celsius.
Hydrogen Bonds Hydrogen bonds are weak physical side bonds that are also the result of an attraction between opposite electrical charges; they are easily broken by water wet setting or heat thermal styling , and they re-form as the hair dries or cools. The amount of disulfide bonds within the hair determines how curly the hair is — the more bonds the curlier the hair. Disulfide bonds are largely responsible for how strong our hair is and how prone it is to damage.
But, disulfide bonds themselves can be damaged by bleach and chemical treatments. Using oil in your hair will not only help smooth frizz and add instant shine, but it can also strengthen your ends and seal moisture into your curls. To repair hair that has been extremely damaged from excessive use of dyes or bleach, the best option is Olaplex. If you want to nourish your hair, put an end to frizz, get back the shine, and use keratin treatment.
I recently did a live demo with Olaplex showing viewers how to use Olaplex as a pre-treatment to a keratin treatment. The answer is NO. Skip to content Biology. Table of Contents.
0コメント