Science Vocab 2

2. the law that states that energy cannot be created or destroyed but only transferred between objects or transformed; also known as the first law of thermodynamics
4. a reaction in which the products can react together to re-form the original reactants
7. a loss of electrons in a chemical reaction
8. an exothermic chemical reaction in which a fuel reacts with oxygen
9. a chemical reaction in which two compounds swap cations or anions with each other; also known as a double-replacement reaction
11. a chemical reaction in which one element in a compound is replaced by another element; also known as a single-displacement reaction
12. a substance that slows the rate of a reaction by reducing the effectiveness of catalysts
13. a chemical reaction that releases more thermal energy than it absorbs
15. the state that occurs when forward and reverse reactions each happen at the same rate
17. the principle that state that a chemically system in equilibrium will adjust its equilibrium position in such a way as to reduce the effect of any changes made to the system

1. a chemical reaction in which a single reactant breaks down into two or more products
3. the model that states that for a reaction to occur, the reactant particles must collide with each other, with the proper alignment, and with enough energy
5. a chemical reaction that absorbs more thermal energy than it releases
6. a gain of electrons in a chemical reaction
10. the minimum energy needed for a chemical reaction to occur
14. a substance that helps a reaction happen faster but is not used up in the reaction
16. the speed of a reaction