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Chemistry > Quiz 4/1 > Flashcards

Quiz 4/1 Flashcards

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0
Q

Thermochemistry

A

Energy in the form of heat produced/consumed in the process of a chemical reaction

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1
Q

Thermodynamics

A

Transformation of energy from one form to another

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2
Q

Energy

A

Capacity to do work or transfer heat

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3
Q

Heat

A

Energy that is transferred between objects because of a difference in their temp

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4
Q

Thermal equilibrium

A

Temp is the same throughout. No heat transfer

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5
Q

Work

A

Directed energy change resulting from a process

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6
Q

Law of conservation of energy

A

Energy cannot be created or destroyed, energy can be converted from one form to another

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7
Q

Potential energy -> ?

A

Kinetic energy

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8
Q

Chemical energy -> ?

A

Heat energy

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9
Q

Potential energy

A

Can be converted into work

PE=mgh

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10
Q

State function

A

Properties that are determined by the state of the system, regardless of how you got there

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11
Q

T = what?

A

Kelvin

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12
Q

t = what?

A

Celsius

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13
Q

Kinetic energy formula

A

KE=1/2 mv squared Mass and velocity

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14
Q

System

A

Part of universe we care about

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15
Q

Open system

A

Mass and energy transfer is possible

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16
Q

Closed system

A

Energy transfer only (insulation)

17
Q

Isolated system

A

No transfer

18
Q

Surroundings

A

Everything besides the system

19
Q

___ + ____ = universe

A

System and surroundings

20
Q

Exothermic

A

Heat coming from the system into the surroundings

21
Q

Endothermic

A

Heat going from the surroundings to the system

22
Q

+q

A

Heat in system

23
Q

-q

A

Heat leaving system

24
Q

+w

A

Work done on system

25
Q

-w

A

Work done by sustem

26
Q

E stands for

A

Internal energy of the system (PE+KE)

27
Q

Three types of motion

A

Translational, rotational, vibrational

28
Q

Delta E

A

q + w

29
Q

w= what (when gas expands against a constant pressure)

A

-PdeltaV

30
Q

Calorie

A

Amount if energy required to raise 1g of water 1 degree Celsius

31
Q

Joules

A

SI unit of energy (1 cal=4.184J)

32
Q

Is work a state function

A

No, it depends on how you got there

33
Q

1 cal =

A

4.184J

34
Q

Against a vacuum= how many atm

A

0

35
Q

Enthelpy

A

Quantifies heat flow into or out of the system (at constant pressure)

36
Q

Enthelpy symbol

A

H

37
Q

Enthelpy formula

A

H=E+PV. (Energy, pressure, volume)

38
Q

DeltaH is positive means

A

Endothermic process

39
Q

DeltaH is negative meaning

A

Exothermic process

Chemistry (7 decks)

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