Thermochemistry

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Thermochemistry is a study of thermal and heat change in chemical reaction. The including topics of thermochemistry is internal energy of a substance, exothermic chemical reaction and endothermic chemical reaction. Internal energy is the processed energy by any substance. It can not measure for a substance. But in a chemical reaction the changes in internal energy can be measure. The change of internal energy of a chemical reaction determines that the reaction will be exothermic or endothermic reaction. If in a chemical reaction, the changing of internal energy is positive then the reaction is exothermic. But, the change of internal energy if negative then chemical reaction is termed as endothermic chemical reaction. Positive value of internal energy indicates the reaction will will absorb energy from surrounding. Because, in this case products internal energy is higher than reactant internal energy.

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Mass energy transformation equation

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Attractive force

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