AskEssays.com - Discover essay samples

Hydrogen 2

4.9 of 5.0 (9 reviews)

Contains
622 words
Category
Science

Hydrogen 2 Page 1
Hydrogen 2 Page 2
Hydrogen 2 Page 3
The above thumbnails are of reduced quality. To view the work in full quality, click download.

Hydrogen 2


Hydrogen in it's liquid form has been used in space vehicles for years.

Hydrogen has a high combustion energy per pound relative to any other fuel,

meaning hydrogen is more efficient on a weight basis than fuels currently used in air or ground transportation. Hydrogen is the universe's most abundant element. Most of that hydrogen though, is tied up in chemical bonds. Hydrogen can exist in either a gaseous form or a liquid form. Hydrogen is The liquid form is usually used for storage while the gaseous form is used as a heat transfer, and also as a cooling agent in nuclear power plants. The name hydrogen is Greek for water former. Hydrogen was once called "inflammable air" by a British scientist names Joseph Priestly . French chemist Antoine Laurent Lavoisier then renamed it to today's name, hydrogen.

Hydrogen can be produced in many ways. Electrolysis is a common way hydrogen is produced. Electric current is passed through water which releases the lements it is made of. These elements are hydrogen and oxygen. Today's efficiency of this method is about 65 percent, however 80-85 percent are possible with more research. Another method of producing hydrogen is through chemical means. It is a scientific fact that every metal that is less noble than hydrogen will isplace hydrogen from water . Common materials used in this reaction is sodium or potassium . Sodium plus water will produce hydrogen , NaOH, and heat . Other

reactions include the "producer" reaction that was discovered in 1800 . It involves combining heat, carbon, and water. It then yields hydrogen an carbon monoxide .

Bacteria can also be a hydrogen producer. Bacteria and other microorganisms may

release hydrogen in the process of creating heavier hydrocarbons or oxygen for

assimilation . A process known as Photoconversion or photosynthesis involves

light combining with water, which produces hydrogen and oxygen .

Hydrogen can be stored in a variety of ways. Compressed gas storage and

transportation has been widely used for more than 100 years. Common materials

for storage canisters are mild steel, aluminum, and composites. Storage pressure

for hydrogen ranges from 3,000 to 10,000 P.S.I . Cooling hydrogen to below the

boiling point of -252.7' C allows storage as a cryogenic liquid without the need for pressurization . Cryogenic storage of hydrogen allows regular commercial

shipment by truck and rail. Many commercial processes such as glass

manufacturing, brazing, heat treating, and semiconductor manufacturing are served by deliveries of liquid hydrogen. Liquid hydrogen has also facilitated the U.S. space exploration program. If liquid hydrogen is suddenly subjected to a vacuum it will evaporate with a subsequent cooling of the liquid mass will cause the temperature to fall to below the freezing point of -259' C and solid hydrogen will be produced . This mixture of liquid and solid hydrogen is called "slush" and provides more dense storage of hydrogen than liquid hydrogen. Hydrogen can also be stored in metal hydrides . Hydrogen is pumped into the interaom spaces of a granular metal. When the hydrogen needs to be released the metal is heated. This system is reliable and compact, but is very expensive.

The energy from hydrogen can be harnessed in many ways. One method of

doing this is using a fuel cell. A fuel cell is a device that converts chemical energy directly into electricity via a modified oxidation process . The process also produces heat, water, and carbon dioxide. By-products such as nitrous oxide and sulfur are eliminated because of the low reaction temperatures of 200' - 500' C. Fuel cells create electricity more efficient than ...

You are currently seeing 50% of this paper.

You're seeing 622 words of 1243.

Keywords: hydrogen 2 oxygen, hydrogen 2023, hydrogen 2 mass, hydrogen 2 protons neutrons electrons, hydrogen 2 atomic number, hydrogen 2 atomic mass, hydrogen 2 neutrons, hydrogen 2 mass number

Similar essays


Astrology

The basic astrological assumptions are not hard to grasp. For if astronomy is the study of the movements of the heavenly bodies, then astrology is the study of the effects of those movements. The astronomers of the ancient world assumed a division of the universe whereby the superior, immutable bodies of the celestial worlds ruled...

152 reviews
Download
Lung cancer 2

Lung Cancer Lung cancer is a carcinoma that develops in the epithelial cells that form the interior lining to the lungs. The airways get the most exposure to inhaled pollutants, thus most people who get lung cancer are smokers. Lung cancer is not just one disease. There are many types of cancer that form in the lungs most of which you...

196 reviews
Download
Aedies Aegypti

Aedes Aegypti The mosquito that has attracted the most attention is the mosquito Aedes aegypti. It belongs to the family Culcidae, consisting of about 2,500 species (Encyclopedia Britanica 1999), along with other genera of mosquitoes such as Anopheles, Culex, Orthopodomyia, and the Toxorynchites, to name a few (Womack 1993, E.B....

38 reviews
Download
Crystals

Melt Suspension Crystallization (MSC) is a technique, that can be used for large scale separation and ultrapurification of organic compounds. Because of the high selectivity of crystallization, the moderate operating conditions, and the relatively low latent heat of fusion, the energy consumption of these kind of processes is low. Furthermore,...

116 reviews
Download
Als

Medical history has been filled with an array of diseases and illnesses, ranging from the common cold to deadly killers. Some are easily treatable and others can be terminal, but some of the worst are those that still remain without a cure; one such disease is amyotrophic lateral sclerosis. Amyotrophic lateral sclerosis, or ALS, is a d...

203 reviews
Download
Alternative energy sources

Alternative Energy Sources In the not-too-distant future -- with regard to history's timeline -- there will come a point when fossil fuels will have been depleted and humans will be forced to find alternative sources with which to power automobiles, household heating units and myriad other machinery that utilizes fuel. However, waiting until...

19 reviews
Download
Internet security

The Internet is the community of the future, but if security measures are not put in place and enforced, then it will become more of a slum and less of a community. The primary question is, therefore, who has the obligation to put these security measures into place? Is it the individual users of the computers and the Internet? Is it the respons...

15 reviews
Download
Extra terrestrial

In an ever-expanding galaxy, humans cannot be the only intelligent life forms. Somewhere, in some universe exists a form of life equal, or superior to, intellectual capability and performance of humans. Many people have seen unexplained occurrences that could only be classified as alien life forms. Thousands of humans claim to have seen alien...

190 reviews
Download
Alcoholism an intrepretation

Alcoholism has been a problem throughout the history of humanity, a disease which has caused many people to be overcome with burdens, problems, and debts. Alcoholism is a term that is widely recognized throughout the United States and the World. Alcoholism is a chronic disease, progressive and often fatal; it is a disorder and not due to other...

119 reviews
Download
God Guided Evolution

For centuries man has questioned his origins. Arguments have been made, men have been persecuted, and wars have even been fought involving the beliefs on the creation of the universe. In the modern day two theories have been concocted and have become the basis for debate on the spoken subject. On the far left side is Evolutionism. This is t...

209 reviews
Download
Dinosaurs 2

Just as most dinosaurs are believed to be wild and mean, most are. Unlike the wild and ferocious Tyrannosaurus Rex, the Velociraptor, is a smaller, agile dinosaur. The Brontosaurus can be found with the bigger, more gentle dinosaurs. The Tyrannosaurus Rex, Velociraptor, and Brontosaurus differ greatly in their body structure, diet, and discov...

8 reviews
Download
Capacitors

A device for storing an electrical charge is called a capacitor or electrical condenser. in their simplest form consist of two metal plates, which are separated by a nonconducting layer called the dielectric. As one plate gets charged with a direct- current such as a positive charge, the other plate will be charged with the opposite sig...

91 reviews
Download
Flesh eating bacteria

Flesh-eating bacteria Some call it ?horror? and some call it ?the super germ?, but now, our always known ?regular? bacteria, those one-celled creatures once considered under control with antibiotics, have invaded our hospitals and headlines with a vengeance. The vengeance used against us is caused by an existing organism called necrotizing fasc...

35 reviews
Download
History of Algebra

Algebra is defined by Webster?s New Collegiate Dictionary as a generalization of arithmetic in which letters representing numbers are combined according to the rules of arithmetic. This is not a good definition of algebra. It would take a thick book to really explain it. In fact, to this day it is still being added to. There ar...

134 reviews
Download
Atsisiųsti šį darbą