Question | Answer |
What are some examples of a chemical reaction? | -cooking
-explosions
-burning
-blood clotting
etc. |
Do exothermic reactions give out or use energy? | Give out energy |
What are three things that can increase molecular collisions? | 1. Higher Temperature
2. Higher Concentration
3. More Surface Area |
If the temperature is higher the reaction rate is? | Faster. |
What are the 3 states of matter? | -Solid
-Liquid
-Gas |
What is a chemical reaction? | A chemical reaction is a reaction that forms new substances. |
As the concentration goes lower the reaction rate gets? | Slower. |
What is the law of conservation of mass? | The total mass of the reactants is always equal to the total mass of the products. |
If there is more surface area, the rate of the reaction would be? | Faster. |
What type of energy is released during an exothermic reaction? | Usually heat but also light, sound and electrical energy. |
What type of reaction depends on energy to happen? | an Endothermic reaction for example photosynthesis or baking bread. |
what are the two main types of reactions? | Physical and Chemical. |
WHat are some examples of a physical reaction? | -Melting Ice
-freezing ice
-blending
-crushing something like fruit or ice
-evaporation |
what is a physical reaction? | a reaction that can generally be reversed. it doesn't form any new substances. |