3. Energy And Chemical Reactions Flashcards
(28 cards)
What is a reactant
Substance you start reaction with
Process of breaking chemical bonds or of forming new ones
Chemical reactions
What is a product
What you get from the reaction
Show how reactants change during chemical reactions
Chemical equations
Energy transfer
Chemical reactions that involve a NET release of FREE ENERGY
Ex. hand warmers
Exergonic reactions
Energy transfer
Chemical reactions that involve a NET absorption of FREE ENERGY
Ex. Cythetic ice packs
Endergonic reactions
The amount of energy need to start a chemical reaction
Activation energy
What is a catalyst
Substance that reduces the amount of energy needed for a reaction to occur
What is an enzyme
Protein that acts like a biological catalyst
Reactions where electrons are transferred between atoms (OIL RIG)
Reduction-oxidation reactions
Reduction-oxidation reactions are also referred to as ______
Redox reaction
A reaction where a reactant loses 1 or more electrons to become positive
Oxidation reaction
A reactions where a reactant gains one or more electrons and the substance become negative
Reduction reaction
When Na loses electrons to become stable is an example of a ______ reaction
Oxidation
When Cl gains an electron to become stable is an example of a ______ reaction
Reduction reaction
A homogenous MIXTURE in which one or more substances are uniformly distributed in another substance
Solution
What is a solute
Substance being dissolved in the solution
What is a solvent
The substance in which the solute is dissolved
A heterogeneous mixture in which particle spread through a liquid or a gas but settle out over time
Suspensions
The particles in a suspensions are ______ than solute particles in a solution
Larger
A suspension mixture in which particles do not settle out over time
Colliods
Sized _____ than solution, _____ than suspension
Bigger, smaller
Colloids are also referred to as _____
Colloidal suspensions
Colloids can exist in a ___ or a ___ state
SOL, GEL
