Notes of chemical reaction and equation
N oteswala 2020 Chemical reaction and equations Any process that involves the rearrangement of structure of the substance or conversion of reactants into products is defined as Chemical Reaction . For a Chemical Reaction to occur, the change can be observed in the form of - Change in State : Melting of ice into water. Change in Colour : Iron rusting which has colour change from silver to reddish brown. Change in Temperature : There are two types of reaction i.e Exothermic and Endothermic Reaction. Exothermic Reactions: Those reactions in which energy is released in the form of heat are called Exothermic Reactions . Examples - (1) All combustion reactions e.g. CH 4 + 2O 2 —> CO 2 + 2H 2 O + Heat (2) Thermite reactions e.g. 2A 1 + Fe 2 O 3 —> 2Fe + Al 2 O 3 + Heat Combinations are generally exothermic in nature. The decomposition of organic matters into compost is an example of exothermic reaction. Endothermic Reactions: ...