what is chemical change
Answers
Answer:
➣Chemical changes are also known as chemical reactions.
➣The “ingredients” of a reaction are called the reactants, and the end results are called the products.
➣ The change from reactants to products is signified by an arrow:
➥Reactants → Products
➣The formation of gas bubbles is often the result of a chemical change (except in the case of boiling, which is a physical change).
➣A chemical change might also result in the formation of a precipitate, such as the appearance of a cloudy material when dissolved substances are mixed
Answer:
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your answer is :-
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. Some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. Understanding chemical changes is a major part of the science of chemistry.
When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen. So much energy is released that the hydrogen gas released spontaneously burns in the air. This is an example of a chemical change because the end products are chemically different from the substances before the chemical reaction.
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