Chemical changes occur when a substance combines with another to form a new substance, called synthesis or, alternatively, decomposes 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 exothermicreactions 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 ofchemistry.
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.
Physical because it is still Oxygen. A chemical change results in a chemical equation and thus a new substance. No new substance = no chemical change. Liquefaction is a physical property.
A chemical reaction results in new substances with new properties. So perhaps reactive is the term or chemically reactive.
Chemical property
No, a decaying compost pile is not an example of a physical change. The process of composting results in a different physical appearance or state -- which is physical change -- but it is not reversible and necessitates a change in structure -- which is chemical change.
chemical change
A chemical reaction (change) results in a change in chemical properties.
A chemical change results in a change in chemical composition, while a physical change does not.
change in the chemical aspect or the molecular property.
Chemical change is any change that results in the formation of new chemical substances.
You think probable to the products of a chemical reaction.
Chemical change because the results are different molecules.
chemical change
Chemical change
No, decomposing is a chemical change because it involves the breaking down of molecules into simpler substances. This results in a change in the chemical composition of the original material.
a substance that results from a chemical change
A chemical change produces a form of matter that was not there before. Evidence of a chemical change could be changes in temperature, color, smell, and the production of a gas or a precipitate.
A chemical change results in new compounds being formed. In a chemical change, the atoms rearrange to form different chemical substances with new properties. This is different from a physical change, where the substance remains the same but changes in appearance or state.