Essays Tagged: "Hydrogen bond"

Basic concepts and example in entropy (physical chemistry)

order substance):Phase change of water from liquid to water vapour.Water in liquid states is highly hydrogen bonded, since each water molecule is hydrogen bonded to at least one or more other water mo ... water molecule is hydrogen bonded to at least one or more other water molecule. (individually, each hydrogen bonds can be easily broken and reformed, however there is a large number of them and the en ...

(3 pages) 70 0 4.4 Apr/2002

Subjects: Science Essays > Chemistry

IB Chemistry - Intermolecular Bonding Essay:

:There exists four types of intermolecular bonding, they include ionic, covalent, Van der waals and hydrogen bonding. In order to describe the existence of such bonding you must also understand the co ... d of bonding by the process of electron sharing. From figure 2, you can see that the example of two hydrogen atoms combing. As the atoms get closer together, each electron experiences an attraction to ...

(6 pages) 89 0 4.3 Jan/1997

Subjects: Science Essays > Chemistry

Describing how Hydrogen Bonding is done.

This hydrogen bonding is way different from other uses from the word "bond", since it is a force of attra ... is way different from other uses from the word "bond", since it is a force of attraction between a hydrogen atom in one molecule and a small atom of high electronegativity in another molecule. This m ... is an intermolecular force, not an intramolecular force as in the common use of the word "bond.When hydrogen atoms are joined in a polar covalent bond with a small atom of high electronegativity like ...

(1 pages) 31 0 3.0 May/2003

Subjects: Science Essays > Chemistry

Enzyme Summary

r, repeated, coiling and folding of a protein's polypeptide backbone. This folding is stabilized by hydrogen bonds between peptide linkages. These sections of polypeptide chains are repeatedly coiled ... es. They are alpha helixes and beta pleated sheets. Alpha helixes are helical coils stabilized by a hydrogen bond between every fourth peptide bond. They are usually found in fibrous protein such as k ...

(3 pages) 93 0 5.0 Feb/2004

Subjects: Science Essays > Biology

Water and It's Pollution

n. Physical properties-the result of hydrogen bondingStudied in isolation, the water molecule is deceptively simple. Its tow hydrogen ato ... are joined to the oxygen atom by single covalent bonds. Because oxygen is more electronegative than hydrogen, the electrons of the polar bonds spend more time closer to the oxygen atom. In other words ... lar covalent bonds, with the oxygen region of the molecule having a partial negative charge and the hydrogen having a partial positive charge. The water molecule, shaped something like a wide V, is a ...

(12 pages) 186 1 4.2 Apr/2004

Subjects: Science Essays > Atmospheric Sciences

BioTechnology Essay

ed.The solution is briefly heated to separate the DNA strands, then cooled so that the primers will hydrogen-bond. DNA polymerase now comes in handy; it adds nucleotides to the 3' end of the each prim ...

(3 pages) 62 0 5.0 Jun/2004

Subjects: Science Essays > Biology

Chemistry 10 Study Notes for Matter and Bonding / Bond Types.

δ- Electrons (-) are more "attracted" to the Oxygen It has 8 protons (+) Hydrogen atoms had δ+ Has 1 proton (+) each Can't conduct electricity No ... Represents shared pair of electrons ------ shows intermolecular forces Hydrogen Bonds Interaction btwn H & pairs of electrons of other atoms Lone Pairs o ...

(3 pages) 28 0 0.0 Sep/2004

Subjects: Science Essays > Chemistry

Chem Notes

etal with metalPolar:reflect (F-H/H-F)Nonpolar covalent:2 nonmetals that reflect(H-H/H-H)-to make a hydrogen bond it has to bebonded to either or O,F,N-soluble can they mix(dissolves)likes dissolves l ...

(1 pages) 35 0 1.3 Dec/2004

Subjects: Science Essays > Chemistry

AP Biology: The Properties of Water

roperty is cohesion. The cohesion property is properly defined as the binding of water molecules by hydrogen bonds. Water has this property as a result of the chemical bonding between water. Cohesion ... . Water has this property as a result of the chemical bonding between water. Cohesion of the strong hydrogen bonds allows the water molecules to stick together, almost as a unit of one. A force exerte ...

(4 pages) 42 1 4.6 Dec/2004

Subjects: Science Essays > Biology

AP Biology Chapter 2 Outline

ut 25 chemical elements.1. The four main elements known to be essential to life are carbon, oxygen, hydrogen, and nitrogen.a. These four make up 96% of living matter.2. Trace elements are those requir ... hat is called an ionic bond.IV. Weak chemical bonds play important roles in the chemistry of lifeA. Hydrogen Bonds1. A hydrogen bond occurs when a hydrogen atom covalently bonded to one electronegativ ...

(5 pages) 37 1 4.5 Feb/2005

Subjects: Science Essays > Biology

BIOLOGY DNA NOTES

ne and Thymine have two bonding sites, while Cytosine and Guanine have three bonding sites (for the hydrogen bond)v. Two long chains of nucleotides combine by condensation to form the DNA molecule. Ea ... hain is composed of single nucleotides connected to each other. The two chains are joined by a weak Hydrogen Bond.vi. The DNA's structure is called a Double Helix because it is made of a structure tha ...

(5 pages) 71 0 2.5 Mar/2005

Subjects: Science Essays > Biology

The Periodicity of Hydrides in Groups 4 to 7

Hydride is the name given to any hydrogen compound. There are three types of hydrides: ionic hydrides, covalent hydrides and transiti ... rides: ionic hydrides, covalent hydrides and transitional metal hydrides. Ionic hydrides consist of hydrogen and an electropositive metal. The hydrogen atoms form ionic bonds with an electropositive m ... rom the metal to complete its S-shell. Covalent hydrides however consist of a covalent bond between hydrogen atoms and electronegative metals (generally groups 4-7). In transitional metal hydrides, th ...

(3 pages) 21 0 0.0 Apr/2005

Subjects: Science Essays > Chemistry

Hydrogen Bonding including BRIEF mentions to forces between non-metals and application of hydrogen bonding.

Hydrogen bonding can simply be defined as a strong type of intermolecular dipole-dipole attraction i ... ver, if the difference in electronegativity is small, then the intermolecular forces will be weaker.Hydrogen bonding occurs between highly δ+ hydrogen atoms and a lone pair of electrons on eithe ... e of electronegativity is observed, it can be seen that the difference in electronegativity between hydrogen atoms and nitrogen, oxygen or fluorine atoms are the greatest being 0.61, 1.17 and 1.8 resp ...

(3 pages) 21 0 0.0 Aug/2005

Subjects: Science Essays > Chemistry

Electronegativity.

ed Intermolecular Forces. There are three types of intermolecular forces: ionic, dipole-dipole, and hydrogen bonding. In ionic bonding opposite charges attract each other, ionic forces also hold many ... f the molecule has a partial positive charge while the other end has a partial negative charge. The hydrogen bond is really a type of dipole forces. A hydrogen bond is the attractive force between the ...

(1 pages) 11 0 0.0 Sep/2005

Subjects: Science Essays > Chemistry

Hydrogen Bonding Essay.

HYDROGEN BONDING:Hydrogen bonding is a bonding type consisting of dipole and dispersion forces. A hy ... type consisting of dipole and dispersion forces. A hydrogen bond is the attractive force between a hydrogen atom attached to a molecule and an atom of a different molecule.According to the Pauling sc ... d fluorine. These are also called heteroatoms. The heteroatoms have a partial negative charge while hydrogen has a partial positive charge.Hydrogen bonding is generally stronger than most bonds bar co ...

(3 pages) 31 1 4.0 Sep/2005

Subjects: Science Essays > Chemistry

The Importance of Water to Life on Earth.

osystem and how important it is to us today.Each water molecule consists of one oxygen atom and two hydrogen atoms. The oxygen atom bears a slight electronegative charge while hydrogen possesses a mor ... , the water molecules are drawn together. When an oxygen atom is linked to a neighboring molecule's hydrogen atom, a bond called a hydrogen bond is formed. In an ice crystal the hydrogen bonds govern ...

(3 pages) 35 0 3.0 Jan/2006

Subjects: Humanities Essays > Health & Medicine

Properties of water and their importance to the natural world

)Water is a polar molecule with covalent bonding between the electronegative oxygen atom and the hydrogen atoms. Plainly stated, polarity refers to how polar a chemical bond is. To find the polari ... and above 0.3, the bond is polar. Thus the attraction of polarity is electrical, slightly positive hydrogen of one molecule is attracted to the slightly negative oxygen of a nearby molecule. The two ...

(3 pages) 59 0 5.0 Apr/2006

Subjects: Science Essays > Biology

The chemistry of water

A water molecule consists of one atom oxygen with two atoms of hydrogen connected to it forming a “V.” HOH is a polar molecule with means that charges un ... of charges creates a negative charge on the oxygen side and a negative charge on the side with the hydrogen atoms. This creates hydrogen bonding which gives water its unusual characteristics. Hydroge ... hen the positive part of one water molecule attracts a negative part of a different water molecule. Hydrogen bonding makes water have unusual properties that also make life possible on earth.Hydrogen ...

(2 pages) 25 1 2.0 Jun/2007

Subjects: Science Essays > Chemistry

Nickel metal hydrive battery for electric vehical

very high power, long life, quick charge and easy to maintain.CELL REACTION The NiMH battery stores hydrogen as a reaction product in the solid phase. The anode electrode contain hydrogen material tha ... The anode electrode contain hydrogen material that can allow electrochemical storage and release of hydrogen during charge and discharge. The cathode electrode is reversible between Ni(OH)2 and nickel ...

(2 pages) 1239 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Biological Importance of Water

e earth and composes roughly 78% of our body. Most of water's unique properties are a result of the hydrogen bonds between water molecules.Structure of Water1.Hydrogen bonds because water molecules ar ... another, making water very dense. In addition, as a result of the attractive forces, the oxygen and hydrogen atoms form hydrogen bonds. Since the oxygen atom has two pairs of nonbonding electrons, eac ...

(2 pages) 13 0 3.0 Mar/2008

Subjects: Science Essays > Biology