Essays Tagged: "Chemical Energy"


ions.Light reactions (require sunlight)chlorophyll uses sunlight to split water and form oxygen and chemical energy.Dark reactions (don't require light)use chemical energy from light reaction to conve ... aking down food (glucose) to get energy.Every step of this pathway is controlled by enzymes.Overall Chemical Equation:Glucose is broken down and energy is formed in a three step process.GlycolysisGluc ...

(2 pages) 68 1 4.5 Jan/1997

Subjects: Science Essays > Biology > Plant Biology

Fuel cell technology and automobiles.

pplication in which it is being used is in theNASA space program. The fuel cell works by converting chemical energy intoelectrical energy and heat, as long as there is sufficient fuel present to suppl ... f fuel needed. The basic elements needed for a fuel cell to work arehydrogen and oxygen, making the chemical emission basically water vapor.Many companies and agencies are diligently working on produc ...

(3 pages) 132 0 4.5 Jul/2003

Subjects: Science Essays > Environmental Science

These notes explain some basic laws and definitions of energy in general and how organisms use energy.

energy than at 25 ft highcells - molecules have potential energy due to the arrangement of the atomsChemical Energy - potential energy of molecules important for living organismsThermodynamicsThermody ... a systemHeat is a form of disorder (random molecular motion)ex 1: fuel in tank of car - all of the chemical energy that isconverted into kinetic energy will eventually beconverted into heat energy. W ...

(4 pages) 80 0 5.0 Jan/2004

Subjects: Science Essays > Biology


metabolism.In photosynthesis, carbon dioxide is converted to carbohydrates; energy from sunlight to chemical energy. The "energy shuttle" produced in photosynthesis is adenosine triphosphate (ATP); it ... photosynthesis. Photosynthetic pigments transfer absorbed light energy to electrons that then enter chemical reactions. (272) "Chlorophyll a" is the essential photosynthetic pigment in all plants, alg ...

(2 pages) 68 1 4.3 Sep/2004

Subjects: Science Essays > Biology > Plant Biology

Rate of Photosynthesis.

BACKGROUND:Photosynthesis is the process in which light energy is converted to the chemical energy of sugars. It can be summarised in the following equation.Cardon dioxide + Water in ...

(5 pages) 52 0 0.0 Oct/2005

Subjects: Science Essays > Biology > Plant Biology


photosynthesis is the ability of chlorophyll, the green pigment in plants, to convert sunlight into chemical energy.In measuring the temperature of the atmosphere we find that there are four levels wh ... , gas and oil - actually it's the incomplete combustion of impure fuels that causes pollution.Photo chemical smog results from the chemical reactions of hydrocarbons with oxygen in the air and other p ...

(6 pages) 75 1 4.2 Oct/2005

Subjects: Science Essays > Earth Sciences


Energy cannot be created or destroyed; it can be changed from one form to another.b. In an engine, chemical energy of coal converts to heat; heat energy converts to kinetic energy.c. In human body, c ... t; heat energy converts to kinetic energy.c. In human body, chemical energy in food is converted to chemical energy in ATP and thenconverted to mechanical energy of muscle contraction.2. Second law of ...

(2 pages) 45 0 4.0 Nov/2005

Subjects: Science Essays > Biology

Hydrogen Fuel Cells: A Better Source of Energy?

for cars. One of the few ways is to use a hydrogen fuel cell, which is a catalyst that converts the chemical energy of a fuel, such as hydrogen, and an oxidant, such as oxygen, directly to electricity ... ge and scientist. In 1839, William Grove experimented with electrolysis, which is the production of chemical energy by passing an electric current through a liquid used to break up a compound into ele ...

(7 pages) 71 0 4.0 Jun/2006

Subjects: Science Essays > Chemistry

Photosynthesis in Plants

hlorophyll present in the chloroplasts, converts the light energy from the sun and converts it into chemical energy. It also traps the sun's light energy. Hence, the light is obtained from the sun, bu ...

(4 pages) 59 0 3.5 Sep/2006

Subjects: Science Essays > Biology > Plant Biology

Business Research Problem/ Opportunity

with sugar cane production.Electricity from BagasseSucrose accounts for little more than 30% of the chemical energy stored in the mature plant; 35% is in the leaves and stem tips, which are left in th ... ents in fertilizers and natural pesticides have all but eliminated the need to burn fields, however chemical pollution from runoff may turn out to be just as harmful to the environment as the smoke. T ...

(4 pages) 90 1 3.0 Jul/2007

Subjects: Businesss Research Papers

Comparison & Contrast between Photosynthesis and Cellular Respiration

Cells of all organisms are capable in acquiring the energy necessary to fuel chemical reactions for growth, repair, survival, and reproduction. Photosynthesis & cellular res ... other organisms convert, light energy from the sun, CO2 from the air & H2O from the earth, into chemical energy stored in molecules like glucose. Cellular respiration is a process in which O2 is d ... back into light reaction that produces the reactants of dark reactions. This cycle is called a bio-chemical pathway. Sometimes plants can't produce 3-carbon compounds. There are two types of solution ...

(4 pages) 91 0 0.0 Nov/2007

Subjects: Science Essays > Biology > Plant Biology


Photosynthesis is the conversion of light energy to chemical energy. I occurs in two stages. These are the light reactions and the dark reactions.The li ... ectron carrier NADP. As a result of the light reactions, the energy of light which was converted to chemical energy is stored in the bonds of NADPH and in the ATP formed by phosphorylation.The dark re ...

(2 pages) 21 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Fuel Cells: Can a 19th Century Discovery be the Solution for the 21st Century Energy Problem?

in an atomic bomb? The most promising technology to date has been the fuel cell, which converts the chemical energy directly into electric energy. Since fuel cells generate power electrochemically, th ... nwhile the internal combustion engine was developed. Add to this the discovery of petroleum; Electrochemical approaches to energy production were quickly abandoned.Not until 1959 was the first success ...

(7 pages) 19 0 3.0 Aug/2008

Subjects: Businesss Research Papers > Markets & Exchanges

How are Car batteries made and how they work ?

How are car batteries made and how do they work? Include chemical reactions that are involved in the process.A battery is a device for storing chemical energ ... t are involved in the process.A battery is a device for storing chemical energy and converting that chemical energy into electricity. A car battery is a type of rechargeable battery that supplies elec ... a traction battery used for the main power source of an electric vehicle.A battery stores energy in chemical form that can be released on demand as electricity. This electrical power is used by the ca ...

(3 pages) 11 0 3.0 Jan/2009

Subjects: Science Essays

The Life Cycle of Coral Reefs

in exchange for energy the algae extract energy from the sun. This recycling process is a beautiful chemical conversation.Reef-building corals initiate photosynthesis as sunlight penetrates the waters ... sunlight can provide millions of microscopic algae with a source of light energy for conversion of chemical energy.Ninety-eight percent of the coral’s food comes from algae, the tiny plants that ...

(3 pages) 40 1 0.0 Mar/2009

Subjects: Literature Research Papers > Creative Writing > Descriptive Essays

Biomass Energy; Biofuels

tors, mostly wood and paper. **Biomass is organic material which has stored sunlight in the form of chemical energy. It is usually thought of as garbage. Biomass can be dead trees, tree branches, yard ...

(3 pages) 28 0 5.0 Apr/2009

Subjects: Science Essays > Biology

Effect of pH Levels on the Growth of Bean Plants

s is the a process by which energy from the sun is trapped by chlorophyll and is later converted to chemical energy with the key reactants of water, carbon dioxide and light6. Osmosis is the diffusion ... rnational Inc. to the United States and the state of West Virginia on April 2009. Not only have the chemical manufacturing complex made modifications to their plant in 1996 without first obtaining pre ...

(15 pages) 23 0 5.0 Jul/2009

Subjects: Science Essays > Biology > Plant Biology

Investigating a factor that affects the volume of H2 at the cathode in an electrolysis reaction

ctrolytic cell electricity is passed through an electrolyte and electrical energy is converted into chemical energy. Electrolysis enables neutral elements to be released from ionic compounds by discha ...

(2 pages) 1217 0 2.0 Jan/2010

Subjects: Science Essays > Chemistry

An Investigation of Photosynthetic Electron Transport of Chloroplasts from Silverbeet Leaves

o ATP, the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy is associated with the actions of the green pigment, chlorophyll. Light Dependent Re ... quiring the direct energy of light for it to occur as it is a process of converting light energy to chemical energy. The process of photosynthesis takes place in the chloroplasts, specifically the chl ...

(5 pages) 6 0 0.0 Apr/2013

Subjects: Science Essays > Biology