The colour, the temperature and formation of gas
Heat?
Chemical equations show the identities of the substances involved in a chemical reaction and the ratios in which they react or are produced. They do not provide a summary of physical changes such as changes in state or appearance. Physical changes involve alterations in the physical properties of a substance without changing its composition.
It is a chemical change because the reaction involves the breaking and forming of chemical bonds in order to create new substances. Physical changes typically involve changes in state or appearance without altering the chemical composition of the substances involved.
It refers to the energy changes that take place during a chemical reaction.
A chemical reaction changes the chemical properties of substances involved by forming new substances with different chemical compositions. This can result in changes in physical properties such as color, temperature, odor, and state of matter.
An exothermic reaction and the change between potential and kinetic.
Luster is a physical property, not a chemical reaction. It refers to how light is reflected off the surface of a material, giving it a shiny appearance. It is based on the arrangement of atoms in the material and not on any chemical changes.
Chemical changes occur after a chemical reaction.
Evidence of a chemical reaction includes the formation of a new substance with different properties, changes in color, the release of gas or heat, or the formation of a precipitate. Additionally, changes in mass due to the rearrangement of atoms in the reactants can also indicate a chemical reaction has occurred.
law of consevation of mass states that the total mass before a chemical reaction is the same as the total mass after the chemical reaction
Turning a penny gold is a physical reaction rather than a chemical reaction. This process involves coating the penny with a layer of gold, which changes its appearance but does not alter the chemical composition of the penny itself.
Heat?
yes
This is a chemical reaction.
It is one way of representing a chemical reaction: it tells you what reacts and what is produced. Word equations are an efficient way to describe chemical changes, to help chemists recognize patterns, and to predict the products of a chemical reaction.
Chemical reactions are of course chemical changes.
It changes them