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AP Chemistry > Unit 6 > Flashcards

Unit 6 Flashcards

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1
Q

Energy

A

capacity to do work or produce heat

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2
Q

In chemistry we are concerned with,…

A

heat transfer that occurs during chemical reactions

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3
Q

law of conservation of energy

A

energy of the universe is constant

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4
Q

Potential energy is due to

A

position or composition

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5
Q

PE is able to be

A

converted to work when used

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6
Q

Kinetic energy depends on

A

mass and velocity of object

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7
Q

energy is able to be converted from ____ to ____

A

PE to Kinetic energy

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8
Q

Two ways to transfer energy

A

heat and work

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9
Q

Heat involves the transfer …

A

energy btwn two objects at different temperatures

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10
Q

heat moves from ….

A

high to low

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11
Q

work

A

force acting over a distance

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12
Q

PE is transfered through work ….

A

from one object to another

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13
Q

States function/state property

A

energy

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14
Q

Function/properrty depends on…

A

present state of matter only

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15
Q

non state functions

A

work and heat

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16
Q

Energy changes are independent of the pathway taken because…

A

measured value is always the same

17
Q

Two parts universe is divided into

A

System & Surroundings

18
Q

System

A

part of the universe we wish to focus our attention on

19
Q

Example of systems

A

products and reactants

20
Q

Surroundings

A

everything else in the universe

21
Q

Example of surroundings

A

container the reaction takes place in

22
Q

In chem, we always take…

A

systems point of view

23
Q

exothermic

A

system to surroundings

24
Q

endothermic

A

surroundings to system

25
Q

first law of thermodynamics

A

energy of universe is constant

26
Q

Internal energy of system equals

A

sum of ke & pe

27
Q

In delta E= q + w, the sign reflects

A

systems point of view

28
Q

system works on surroundings w is ___ because _____

A
  • because work flows out of system
29
Q

surroundings are working on the system w is ____ because ____

A

+ because energy will flow into the system

30
Q

if gas is expanding w is…

A

negative

31
Q

if gas is compressing w is…

A

positive

32
Q

Is enthalpy a state function or nonstate function?

A

state function (fixed)

33
Q

Enthalpy

A

measurement of the flow of heat in a system

34
Q

Calorimetry

A

device used to determine the heat associated w a chemical reaction

35
Q

calorimetry is based upon…

A

temperature changes

AP Chemistry (16 decks)

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