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Can light bring about chemical reactions and can chemical reaction produce light?
Wiki User
∙ 12y ago
Light can indeed cause chemical reactions. A very good example of this happens constantly above our heads. The light from the sun causes the formation of oxygen radicals in the atmosphere by disocciation. The formula for this is:
O2 + hv --> 2O. , where h is planck's constant and v is the frequency of the light.
The "." on the oxygen atoms formed represent a single unpaired electron which causes them to become very reactive (they will react with almost anything). They react with other O2 molecules to form O3, better known as ozone. This is how the ozone layer is formed.
Reactions can indeed produce light. Ever used a glowstick? You break a capsule inside and then shake the stick to cause a chemical reaction which gives off light. This also explains why glowsticks stop glowing. The reaction has finished. Unfortunately I do not know the reaction for this process or indeed which chemicals are involved.
Wiki User
∙ 12y ago
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Are enzymes involved in synthesis reactions only?
an enzymatic reaction can bring about only synthesis?
Why is catalytic activity of enzymes essential to ensure and regulate cellular metabolism?
Enzymes lower the activation energy for chemical reactions, allowing the reactions to proceed. Enzymes also can serve to bring components of a reaction together in the proper orientation. Enzymes can hydrolyze macromolecules into smaller components, enabling them to be transported across the cell membrane. Without enzymes, many metabolic reactions would not be able to be conducted efficiently, if at all.
Enzymes and their co enzymes?
enzymes are made up of protein. amino acids are a type of protein, but if ever askeda question on what they are made up of, the simple answer of :protein, will beappropriate. enzymes are what speed up the chemical reactions in our body, if wedid not have enzymes the chemical reactions would take a lot longer to take placeand could effect our body functions as the chemical reactions are not happening asthey are suppose to.
How do you find the product for the chemical reaction?
The product is hydrogen. to test for hydrogen, take a lighted match or a splint and bring it near the place where you think there is hydrogen and if you hear a squeaky "POP!" there is hydrogen there
Thylakoid membranes bring together the components necessary to carry out the?
light reactions
Why are enzymes important to cell?
They help bring about chemical reactions.
Are enzymes involved in synthesis reactions only?
an enzymatic reaction can bring about only synthesis?
What occurs during a chemical reaction?
the element
What is a chemical reagent?
Reagent bottle is a bottle designed to contain chemical reagents. Bottles are made generally from glass, plastic coated glass, polyethylene. The volumes are extremely variable, from 1 mL to liters.
How does mixture of two substances bring a change?
its a chemical reaction which has tiny particles and they cause a change
Is mixing bases and acids bad?
Not necessarily. Sometimes it is necessary to bring a solution to a more neutral pH. However, caution is advised, as some acid-base reactions produce a significant amount of heat.
Why is catalytic activity of enzymes essential to ensure and regulate cellular metabolism?
Enzymes lower the activation energy for chemical reactions, allowing the reactions to proceed. Enzymes also can serve to bring components of a reaction together in the proper orientation. Enzymes can hydrolyze macromolecules into smaller components, enabling them to be transported across the cell membrane. Without enzymes, many metabolic reactions would not be able to be conducted efficiently, if at all.
Why is the catalytic activity of enzymes essential to ensure and regulate cellular metabolism?
Enzymes lower the activation energy for chemical reactions, allowing the reactions to proceed. Enzymes also can serve to bring components of a reaction together in the proper orientation. Enzymes can hydrolyze macromolecules into smaller components, enabling them to be transported across the cell membrane. Without enzymes, many metabolic reactions would not be able to be conducted efficiently, if at all.
What is an agent that causes or speeds up a reaction without permanently altering itself?
Catalysts speed up chemical reactions without being used up or damaged in the process. Catalysts provide an active site that helps to bring chemicals together and thus increase the likelihood of a reaction taking place (and thus speeding up the reaction).As well as speeding up reactions catalysts also reduce the activation energy needed for reactions to take place.Enzymes are biological catalysts made out of protein.All catalysts can be damaged or inhibited by either changing the shape of the active site or blocking it altogether.
What happens when you add an alkali to an alkali?
A chemical reaction. Acid + alkali = salt + water eg H2SO4 + 2NaOH = Na2SO4 + 2H2O Sulfuric acid + Sodium Hydroxide = Sodium Sulfate + water Whan as acid meets an alkali they create a chemical reaction. If there is an acid and you add a weak alkali you should bring it down to neutral.
What accelerates any chemical reaction but is not consumed in the reaction?
A catalyst. There are two types of catalyst: * Homogenous: a catalyst in the same state (i.e. solid, liquid, gas) as the reactants. * Heterogenous: a catalyst in a different state than the reactants
What are the condition needed for a chemical reaction to occur?
Conditions for Chemical ChangeThe criterion for a chemical change is the production of one or more new substances. Therefore, certain conditions should be met in order to bring about a chemical change. The necessary conditions are:· A minimum amount of energy needed to initiate a reaction (activation energy) should be supplied in the form of heat, light or electric current. In a chemical change, the reactants combine to form new products. For this process it is necessary to break the old bonds of the reactants and form fresh bonds, in order to give new products. This requires a certain amount of energy.· For the occurrence of any reaction, the molecules or atoms of the reactants must collide with one another, in order to break old bonds and form new bonds.· The speed with which the chemical reaction takes place is called the rate of the chemical reaction. This should be appreciable, to bring about the change.· The rate of a reaction depends on following factors:1) Temperature2) Presence of light3) Presence of catalyst4) Electricity5) PressureTemperatureCertain chemical reactions do not take place at room temperature but occur readily at a higher temperature. Thus heat is required to start the reaction e.g. fuels like coal and wood only start burning when heated to a certain temperature (ignition temperature).Presence of LightSome reactions take place only in light and do not take place in dark e.g. photosynthesis in green plants or reaction between H2 and Cl2 to form HCl.Presence of a CatalystA catalyst is a substance that increases the rate of chemical reaction without itself undergoing any change.Examples: Hydrogenation of oils to form fats takes place faster, in presence of nickel.Decomposition of potassium chlorate (KClO3) is greatly accelerated in presence of MnO2 (Manganese dioxide).ElectricityCertain reactions take place with the help of an electric current.Example: Decomposition of water (acidulated) to give hydrogen and oxygen gas.PressureSome chemical reactions need very high pressure to proceed. Example, in the manufacture of ammonia from nitrogen and hydrogen (Haber's process), a pressure of over 200 atmosphere is required, in presence of a catalyst iron and a temperature of 450oC to 500oC.
