Be sure to review the EMDC Handbook for specific rules related to chemical reaction components. 

A chemical reaction component refers to a specific element or mechanism within the machine that involves a chemical reaction to trigger or contribute to the overall chain reaction process. These components can add an element of excitement, surprise, or complexity to the machine’s design, and they often involve chemical reactions that generate gas, heat, light, or other forms of energy.   

A chemical reaction is defined as two or more molecules reacting to create a new compound or change in molecular structure. For a chemical reaction to occur, a chemical change must occur (i.e., start with one molecule and turn it into another). This is achieved by either making or breaking chemical bonds. An example of this is the rusting of steel or bleach removing a stain. It is important to note that a chemical reaction is not the same as a physical change. An example of a physical change is melting an ice cube into a liquid. 

It’s important to note that when incorporating chemical reaction components into a chain reaction machine, safety should be the utmost priority. Careful planning, proper ventilation, suitable personal protective equipment, and controlled use of reactants are essential to ensure the well-being of the participants and spectators. Participants should have a thorough understanding of the chemicals involved, their properties, and the potential hazards associated with their use. Providing detailed guidelines, safety instructions, and supervision throughout the design and construction process will help ensure a safe and successful engineering machine design contest.  

Additionally, it is advisable to consult with a science teacher, mentor, or a professional in the field to provide guidance, supervision, and ensure adherence to safety protocols during the design and execution of the chemical reaction components in the machine.