These must be strong enough to cause a chemical change to take place?

Conclusion. According to the collision theory, the following criteria must be met in order for a chemical reaction to occur: Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. Molecules must collide with the proper orientation.

1. What is needed to cause a chemical reaction?
2. What must happen in a chemical change?
3. What causes chemical change?
4. What are 3 ways to increase a chemical reaction?
5. Does chemical change occur?

What is needed to cause a chemical reaction?

When two molecules collide with the right orientation and sufficient force, a chemical reaction may result. Not all collisions cause reactions, however; the atoms or molecules must be able to recombine to form new compounds. ... Breaking bonds between atoms takes up energy, while forming new bonds releases energy.

What must happen in a chemical change?

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

What causes chemical change?

A chemical change occurs when a new substance is formed through a chemical reaction like when fruit ripens or rots. When something undergoes a "chemical reaction" and a new substance is formed as a result, we call this chemical change. In some instances, simply applying heat can cause a chemical change.

What are 3 ways to increase a chemical reaction?

In general, increasing the concentration of a reactant in solution, increasing the surface area of a solid reactant, and increasing the temperature of the reaction system will all increase the rate of a reaction. A reaction can also be sped up by adding a catalyst to the reaction mixture.

Does chemical change occur?

Chemical Change. Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.