Chemical Change Research Paper

b) When popping corn is heated, water inside the kernels becomes a a gas and expands. This creates the pressure to pop a kernel. This is a physical change because the water is just changing state from a liquid to a gas. There is no new substance produced, the popcorn is in a new shape and the water in a new state. Although it cannot be reversed, it can still be a physical

A physical change includes a change in the material without affecting its composition, such as the physical state change. However, a chemical change includes the change in the composition of the substance. The change in color, formation of a gas or a solid product, and the production of energy are the evidences of a chemical reaction, thus, of a chemical change.

A physical change is one that affects only the physical properties of a substance, while a chemical change alters a substance at the molecular level.

This is a simple equation that doesn’t properly prove the reaction. It is very complex and starts with this:

A chemical reaction is a process that involves change of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction. The key concepts of a chemical reaction are:

Mouth wash |B4|The mouthwash was a yellow color as it was original falvor, after adding bromthymol blue the mixture turned a blue again similar the the pine sol. |

4. The following examples do not always indicate chemical change. For example, change in color will always indicate chemical change because the color changes but it does not change the substance’s physical properties. The apparent loss in mass is a phase change; therefore the entire substance goes through a physical change. The apparent disappearance of a substance is a chemical change and will always be a chemical change because it might result of a soluble substance dissolving in a liquid and changes the entire substance in a chemical phase.

Purpose: The purpose of this experiment is to observe a variety of chemical reactions and to identify patterns in the conversion of reactants into products.

A chemical change is a change that alters the identity of a substance. A chemical change can be identified by five things: change in mass, formation of a precipitate, release of heat and/or light, color change, or giving off gas.

Chemical and physical properties of substances are due to the structure and arrangement of atoms, ions or molecules and how these interact with each other

This is a chemical change because a new color is created and it is exciting the electrons. Burning is a chemical reaction because there is a new substance being created. There is also a color change and that is another way to tell that it was a chemical reaction. A new substance was made this is why it was a chemical change. If you take ice for example and melt it turns into a liquid. This is not a chemical change because it is still water just in a different form nothing new is created. Unlike when the salt solutions are burned and something totally new is created/

Chemical reactions make new things by rearranging other things. In a chemical reaction, the main change that occurs relates to the way atoms are bonded to each other, in order to change those connections, bonds must be broken and new bonds be formed.

Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance.

When ice melts into water, it is not a chemical changes due to the fact that the chemical is the same but the form is not.

A chemical reaction is a process in which elements or compounds react with one another to create new or different substances. There are two parts to a reaction. Those two parts are the products and the reactants. The reactants are the chemicals or chemical compounds that are going through the reaction itself. The products are chemical elements or chemical compounds that are produced as a result of the reactant or reactants reacting. There are four key indications that there’s a chemical reaction is taking place. Those four signs include a change in color and/or odor, formation of a precipitate or a gas, the release or absorption of energy (light, heat, electricity), and if the reaction is irreversible. Along with this information, there are ways to predict the products of a reaction.