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Biology > 3. Energy And Chemical Reactions > Flashcards

3. Energy And Chemical Reactions Flashcards

0
Q

What is a reactant

A

Substance you start reaction with

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1
Q

Process of breaking chemical bonds or of forming new ones

A

Chemical reactions

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2
Q

What is a product

A

What you get from the reaction

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3
Q

Show how reactants change during chemical reactions

A

Chemical equations

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4
Q

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

A

Exergonic reactions

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5
Q

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

A

Endergonic reactions

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6
Q

The amount of energy need to start a chemical reaction

A

Activation energy

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7
Q

What is a catalyst

A

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

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8
Q

What is an enzyme

A

Protein that acts like a biological catalyst

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9
Q

Reactions where electrons are transferred between atoms (OIL RIG)

A

Reduction-oxidation reactions

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10
Q

Reduction-oxidation reactions are also referred to as ______

A

Redox reaction

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11
Q

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

A

Oxidation reaction

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12
Q

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

A

Reduction reaction

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13
Q

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

A

Oxidation

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14
Q

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

A

Reduction reaction

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15
Q

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

A

Solution

16
Q

What is a solute

A

Substance being dissolved in the solution

17
Q

What is a solvent

A

The substance in which the solute is dissolved

18
Q

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

A

Suspensions

19
Q

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

A

Larger

20
Q

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

A

Colliods

21
Q

Sized _____ than solution, _____ than suspension

A

Bigger, smaller

22
Q

Colloids are also referred to as _____

A

Colloidal suspensions

23
Q

Colloids can exist in a ___ or a ___ state

A

SOL, GEL

24
Q

A SOL is a ____

A

Liquid

25
Q

A GEL is a ____

A

Solid

26
Q

Solute to Solvent Ratio

The ratio of a solute to a set amount of solvent

A

Concentration

27
Q

Solute to Solvent Ratio

Point where no more solute can be dissolved at a given temperature

A

Saturated

Biology (4 decks)

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