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Examples Of Physical Changes

Examples Of Physical Changes

Submitted by • September 26, 2012

chemistry.tutorvista.com - No new product is formed. The molecular composition remains totally unaltered. During the physical change only the arrangement of molecules gets altered leading to the change in state. For example, the molecular compositions of ice and water remain same.

Endothermic Reaction

Endothermic Reaction

Submitted by • September 24, 2012

chemistry.tutorvista.com - Reactions that are accompanied by absorption of energy from the surroundings are called endothermic reactions. Since heat is added to the reactants in these chemical reactions, it is indicated by either putting +q or by writing the actual numerical value ...

Electrochemical Cell

Electrochemical Cell

Submitted by • September 22, 2012

chemistry.tutorvista.com - Electrochemical cell converts the chemical energy to electrical energy and the reaction occurs in an electrochemical cell is always spontaneous. These cells are very important because of their many practical applications. An early example of electrochemical cell is Daniell cell, ...

Degrees Of Unsaturation

Degrees Of Unsaturation

Submitted by • September 20, 2012

chemistry.tutorvista.com - The unsaturated organic compounds contains double bonds while the compounds contain no any multiple bonds are known as saturated compounds. The unsaturated molecules have both the sigma and pi-bond. Thus the unsaturation is due to the presence of pi-bond.

Charles Law Formula

Charles Law Formula

Submitted by • September 17, 2012

chemistry.tutorvista.com - In 1787, Jacques Alexander Cesar Charles, a French chemist, discovered that with rise in temperature carbon dioxide, hydrogen, oxygen and nitrogen expand at constant rates provided the pressure is kept constant.

Carbohydrates Function

Carbohydrates Function

Submitted by • September 17, 2012

chemistry.tutorvista.com - Carbohydrates are formed by green plants as a product of photosynthesis and are the most abundant compounds found on earth. Carbohydrates are organically derived compounds composed of carbon atoms combined with "hydrates" (such as water, H2O). All carbohydrates follow the ...

What Are Proteins Made Of

What Are Proteins Made Of

Submitted by • September 12, 2012

chemistry.tutorvista.com - Proteins are compounds found in all living cells, in animals and plants. They play a variety of important roles and are essential to maintain the structure and function of all lifeforms. The word 'protein' is derived from the Greek word ...

Acid Dissociation Constant

Acid Dissociation Constant

Submitted by • September 12, 2012

chemistry.tutorvista.com - An acid is ionizes partially in aqueous solutions is a weak acid. The strengths of weak acid can be compared using their dissociation constants. A weak acid ionizes partially as follows. HA (aq) H+ (aq) + A-(aq).

Wave Particle Duality

Wave Particle Duality

Submitted by • September 11, 2012

chemistry.tutorvista.com - Initially light considered as waves washing around like water waves as well as considered as particles shooting around like tiny bullets. How anyone can decide the nature of light at any instant that was a big puzzle for scientist. Until ...

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