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Flashcards in 3. Energy And Chemical Reactions Deck (28)
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Process of breaking chemical bonds or of forming new ones

Chemical reactions

1

What is a reactant

Substance you start reaction with

2

What is a product

What you get from the reaction

3

Show how reactants change during chemical reactions

Chemical equations

4

Energy transfer
Chemical reactions that involve a NET release of FREE ENERGY
Ex. hand warmers

Exergonic reactions

5

Energy transfer
Chemical reactions that involve a NET absorption of FREE ENERGY
Ex. Cythetic ice packs

Endergonic reactions

6

The amount of energy need to start a chemical reaction

Activation energy

7

What is a catalyst

Substance that reduces the amount of energy needed for a reaction to occur

8

What is an enzyme

Protein that acts like a biological catalyst

9

Reactions where electrons are transferred between atoms (OIL RIG)

Reduction-oxidation reactions

10

Reduction-oxidation reactions are also referred to as ______

Redox reaction

11

A reaction where a reactant loses 1 or more electrons to become positive

Oxidation reaction

12

A reactions where a reactant gains one or more electrons and the substance become negative

Reduction reaction

13

When Na loses electrons to become stable is an example of a ______ reaction

Oxidation

14

When Cl gains an electron to become stable is an example of a ______ reaction

Reduction reaction

15

A homogenous MIXTURE in which one or more substances are uniformly distributed in another substance

Solution

16

What is a solute

Substance being dissolved in the solution

17

What is a solvent

The substance in which the solute is dissolved

18

A heterogeneous mixture in which particle spread through a liquid or a gas but settle out over time

Suspensions

19

The particles in a suspensions are ______ than solute particles in a solution

Larger

20

A suspension mixture in which particles do not settle out over time

Colliods

21

Sized _____ than solution, _____ than suspension

Bigger, smaller

22

Colloids are also referred to as _____

Colloidal suspensions

23

Colloids can exist in a ___ or a ___ state

SOL, GEL

24

A SOL is a ____

Liquid

25

A GEL is a ____

Solid

26

Solute to Solvent Ratio
The ratio of a solute to a set amount of solvent

Concentration

27

Solute to Solvent Ratio
Point where no more solute can be dissolved at a given temperature

Saturated