Evidences of Chemical Reactions
All chemical bonds posses potential energy. In a chemical reaction this energy is changed when old bonds are broken and new bonds are formed. Chemical changes are different from physical changes. When a physical change occurs there is no breaking and forming of bonds. There are certain things that will help us identify if a chemical reaction has taken place. We call these evidences of chemical reactions.
- Light is given off: Potential energy in valance electrons is released in the form of light.
- Gas is given off: Indicates an increase in kinetic energy of the atom (compound) as it is changed to a gas.
- Temperature change: Exothermic is an increase in the speed of the molecules (heat). Exothermic is the taking in of energy.
- Color change: the increase or decrease of potential energy stored in new bonds.
- Precipitate formed: increase or decrease of potential energy in new bonds formed.
- Electrical potential: The release of chemical bond energies to cause the movement of valence electrons.
All chemical reactions, whether simple or complex, involve changes in substances. One or more starting substances, the reactants, are changed into one or more new substances, the products.
Reactants ---- Products
In a chemical reaction the ways in which atoms are joined together are changed. Bonds are broken and new bonds are formed as reactants are converted into products. The atoms are not created or destroyed. They are just rearranged.
Chemical reactions can be described in different ways. For example, we could say: "Iron reacts with oxygen to produce iron (III) oxide (rust)." Alternatively, we could identify the reactants and product in this reaction by writing a word equation.
Iron + oxygen ---- iron (III) oxide
In a word equation, the reactants are written on the left, and the products are written on the right. They are connected by an arrow ( ---- ) that is read as "yields" or "reacts to produce." Word equations communicate the reaction but can get cumbersome. To be more efficient chemists use chemical formulas for writing equations. For example the rusting of iron would be represented as follows:
Fe + O2 ---- Fe2O3.
There are chemical reactions in everyday life such as, in the way you breathe the food you eat, the water you drink and in every motion that goes around you at every second of the day. This is a very important and interesting concept that can be taught to your children because they have to know how their world works. The best way to explain this to them is to show them practically how and why some things in nature in their way! You can do this by showing a child some chemical experiments for them. A chemistry in the essay of everyday life can be a good start to teach these children, how beautiful, chemistry. Find out what this intelligent nature mechanism, which determines the chemistry in everyday life.
-
• Water, which occupies 70% of the earth's surface is made up of two
chemical elements,
Hydrogen and oxygen.
• Soap is an emulsifier that allows oil and water to mix and so the oily mixture on the body and clothing can be removed after application of soap and water.
• Chemistry in everyday life for children can also include why colored vegetables. Colored vegetables consist of chemical compounds called carotenoids that have an area known as the chromophore. It absorbs certain wavelengths of light and thus there are colorful vegetables.
• Food is cooked because the steam is present either in added water or those that are present in the food.
• Onions make you cry because of the presence of sulfur in a resting cell after the onions are cut off. This sulfur will mix with water and thus irritate your eyes.
• You feel hungry because the satiety center in your brain falls short of certain hormones to function and then sends out hunger signals.
• You fall in love, get attracted and have a sense of belonging because certain monoamines are present in your brain that can be stimulated through a nerve sensor.
• If you are wondering why the sky is blue, it is because of a phenomenon called "Rayleigh scattering", which depends on the scattering of light through particles much smaller than the wavelength. Therefore when passing through the light through the gas, there is scattering and the sky looks blue.
• Coffee keeps you awake because of the presence of a chemical called adenosine, in your brain. It binds to certain receptors and slows the activity of nerve cells while sleep is characterized.
• Anaerobic fermentation is also a great concept that is present in the chemistry of everyday life. It is present in yogurt, bread, cakes and many other cake products. This is a multiplication of certain beneficial bacteria that increases the size of the food and makes it more filling and soft.
• The food chain present in every ecosystem is also a major part of the chemistry in everyday life. Despite having a biological background, it finally works because of his chemistry.
other evidence in around :
1. Photosynthesis
Scheme of photosynthesis in plants. The resulting carbohydrates are stored in or used by plants. Source: wikipedia.org
Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the Sun, into a chemical energy that can then be liberated to fuel organism activity. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water. In most cases, oxygen is also produced as a waste product. Most plants, mostly algae, and cyanobacteria do photosynthesis, and these organisms are called photoautotrophs. Photosynthesis maintains atmospheric oxygen levels and supplies all organic compounds and most of the energy needed for life on Earth.
Briefly, plants use a chemical reaction called photosynthesis to convert carbon dioxide and water into food (glucose) and oxygen. It is one of the most common daily chemical reactions and also one of the most important, because this is how plants produce food for themselves and animals and convert carbon dioxide into oxygen.
6 CO2 + 6 H2O + light → C6H12O6 + 6 O2.
Benefits
of Chemistry
Branch of Chemistry
Before really knowing the benefits of chemistry for life, it's good if we know chemistry further. Chemistry is divided into several parts, the parts will have and represent the benefits of different chemistry in each branch. The branch of chemistry among them is,
Organic Chemistry. This field focuses the study on research on organic compounds (hydrocarbon compounds), such as alcohol, gasoline, diesel, and others.
Inorganic Chemicals. This field focuses on studies on the study of inorganic compounds such as salts, minerals, and others.
Biochemistry. This field deals with the biological sciences, especially regarding the nature and composition of the compound and the result of its change reaction. The compounds studied include carbohydrates, proteins, fats, vitamins, enzymes, hormones, and others.
Analytical Chemistry. This field deals with the determination of qualitative and quantitative chemistry, which is more directed to the development and application of increasingly sophisticated analytic equipment.
Chemical environment. This field focuses on studies on environmental issues such as pollution, waste or waste handling, clean water handling, and others.
Core Chemistry (Radiochemistry). This field focuses on studies on radioactive materials, handling and utilization such as for medicine (medicine), agriculture and hydrology.
Pharmaceutical Chemicals. This field focuses on studies on separation (isolation), manufacture (synthesis), and development of natural materials containing active substances for medicine.
Physical Chemistry. This field deals with physics, thus focusing on studies on the energy that accompanies chemical reactions, physical properties of chemistry, and changes in chemical compounds.
Food Chemistry. This field focuses on research studies to improve the quality of food, food additives, and matters related to food needs.
Branch of Chemistry
Before really knowing the benefits of chemistry for life, it's good if we know chemistry further. Chemistry is divided into several parts, the parts will have and represent the benefits of different chemistry in each branch. The branch of chemistry among them is,
Organic Chemistry. This field focuses the study on research on organic compounds (hydrocarbon compounds), such as alcohol, gasoline, diesel, and others.
Inorganic Chemicals. This field focuses on studies on the study of inorganic compounds such as salts, minerals, and others.
Biochemistry. This field deals with the biological sciences, especially regarding the nature and composition of the compound and the result of its change reaction. The compounds studied include carbohydrates, proteins, fats, vitamins, enzymes, hormones, and others.
Analytical Chemistry. This field deals with the determination of qualitative and quantitative chemistry, which is more directed to the development and application of increasingly sophisticated analytic equipment.
Chemical environment. This field focuses on studies on environmental issues such as pollution, waste or waste handling, clean water handling, and others.
Core Chemistry (Radiochemistry). This field focuses on studies on radioactive materials, handling and utilization such as for medicine (medicine), agriculture and hydrology.
Pharmaceutical Chemicals. This field focuses on studies on separation (isolation), manufacture (synthesis), and development of natural materials containing active substances for medicine.
Physical Chemistry. This field deals with physics, thus focusing on studies on the energy that accompanies chemical reactions, physical properties of chemistry, and changes in chemical compounds.
Food Chemistry. This field focuses on research studies to improve the quality of food, food additives, and matters related to food needs.
Benefits of Chemistry for Various Fields
Chemistry has an important position and is required by other fields of science. Some of the actual benefits that it is the benefits of chemistry in human life are not even so conscious. Here are some of the benefits of chemistry in human life that can not be replaced by other science.
1. Field of Medicine
The first benefits of chemistry in human life are in the field of medicine. To assist the healing of patients with an illness, medicines are made based on the results of research into the process and chemical reactions of nutritious substances carried out in the pharmaceutical chemical branch.
2. Agriculture Sector
Maybe you are confused, what is the relationship between chemistry and the field of agriculture, then what Benefits of chemistry For agriculture? Well, is not it to restore soil fertility, it is necessary to add the fertilizer, while the pest can be overcome with the addition of pesticide. The benefits and dangers of the use of fertilizers and pesticides should be understood so as to avoid errors in their use. The thing to remember is fertilizer And pesticides are the "products" of chemistry.
3. Field of Geology
This field deals with the research of rocks (minerals) and gas and petroleum mining. The process of determining the elements that make up the mineral and the preliminary stage for exploration, using the basics of chemistry. The benefits of chemistry in this field to help understand and understand the findings of researchers about
Rocks or "object-Objects "of nature.
4. Field of Biology
This field specifically learns about living things (animals and plants). Chemical processes that take place in living things include digestion of food, breathing, metabolism, fermentation, photosynthesis and others. To learn this, knowledge of the structure and properties of existing compounds, such as carbohydrates, proteins, vitamins, enzymes, fats, nucleic acids and so on. Although in general, this field is more closely related to the science of biology, but the benefits of chemistry also in fact a little more influential in the field of biology.
5. Field of Law
You are confused what is the relation of the field of law to chemistry? The field of law directly does not have any connection with chemistry, but the benefits of chemistry in this field of law can be felt when the enactment of examination equipment buktikriminalitas (kriminologi). The body part of the suspect can be examined by examining its DNA structure because each person's DNA structure is different. This examination involves chemistry.
6. Machine Field
Benefits Chemistry can also concern the field of machinery that is studying the properties and composition of a good metal for the manufacture of machinery, study the nature, composition of fuel and engine oil.
a.t.c.
reaction in our body :
Metabolism In The Body
Cells are the smallest unit of life, therefore cells can carry on life activities, including metabolism. Metabolism is the chemical processes that occur in the body of a living thing / cell. Metabolism is also called enzymatic reaction, because metabolism always occurs using enzyme catalyst. Cells are the smallest unit of life, therefore cells can carry on life activities, including metabolism. Metabolism is the chemical processes that occur in the body of a living thing / cell. Metabolism is also called enzymatic reaction, because metabolism always occurs using enzyme catalyst.Based on the process metabolism is divided into 2, namely:1. Anabolism / AsimilasI / Synthesis,Namely the complex molecular binding process using high energy. Example: photosynthesis (assimilation C)
Light energy6 CO2 + 6 H2O -----------> C6H1206 + 6 02
Chlorophyll glucose (chemical energy)In chloroplast there is transformation of energy, that is from light energy as kinetic energy turns into chemical energy as potential energy, in the form of bond of organic compound on glucose. With the help of enzymes, the process is fast and efficient. When in a reaction requires energy in the form of heat reaction is called an endergonic reaction. Such a reaction is called an endothermic reaction.2. Catabolism (Assimilated),Namely the process of decomposition of substances to liberate chemical energy stored in the organic compound.Example:enzymeC6H12O6 + 6 O2 -----------> 6 CO2 + 6 H2O + 686 KKal.
Chemical energyAs the molecules break down into smaller molecules, the release of energy creates heat energy. When a reaction is released by energy, its reaction is called an exergonic reaction. Such reactions are called exothermic reactions.
Cells are the smallest unit of life, therefore cells can carry on life activities, including metabolism. Metabolism is the chemical processes that occur in the body of a living thing / cell. Metabolism is also called enzymatic reaction, because metabolism always occurs using enzyme catalyst. Cells are the smallest unit of life, therefore cells can carry on life activities, including metabolism. Metabolism is the chemical processes that occur in the body of a living thing / cell. Metabolism is also called enzymatic reaction, because metabolism always occurs using enzyme catalyst.Based on the process metabolism is divided into 2, namely:1. Anabolism / AsimilasI / Synthesis,Namely the complex molecular binding process using high energy. Example: photosynthesis (assimilation C)
Light energy6 CO2 + 6 H2O -----------> C6H1206 + 6 02
Chlorophyll glucose (chemical energy)In chloroplast there is transformation of energy, that is from light energy as kinetic energy turns into chemical energy as potential energy, in the form of bond of organic compound on glucose. With the help of enzymes, the process is fast and efficient. When in a reaction requires energy in the form of heat reaction is called an endergonic reaction. Such a reaction is called an endothermic reaction.2. Catabolism (Assimilated),Namely the process of decomposition of substances to liberate chemical energy stored in the organic compound.Example:enzymeC6H12O6 + 6 O2 -----------> 6 CO2 + 6 H2O + 686 KKal.
Chemical energyAs the molecules break down into smaller molecules, the release of energy creates heat energy. When a reaction is released by energy, its reaction is called an exergonic reaction. Such reactions are called exothermic reactions.
oke, there are topic about evidence chemical in our life. i hope can make we trust. thanks for come to my blog.
No comments:
Post a Comment