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Chemistry L1 Ms.Yocis > Unit 6 Test > Flashcards

Unit 6 Test Flashcards

1
Q

Endothermic equation

A

🔺h on the left (reactants)
Heat goes into the equation
Positive

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2
Q

Exothermic reaction

A

🔺h on the right side (products)
Heat exits the reaction
Negative

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3
Q

Calorimeter

A

Device that measures the release of heat

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4
Q

Enthalpy of Reaction

A

Net Energy change during a chemical reaction

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5
Q

Enthalpy of formation

A

Energy change when a mole of a compound is formed from elemental states

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6
Q

Heat of reaction equation

A

🔺H rxn= E hf product- E hf reactants

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7
Q

Molar heat of fusion-

A

Energy required to melt Solid to liquid of a substance

Breaks bonds

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8
Q

Molar heat of vaporization

A

Energy required to go liquid to gas

Endothermic

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9
Q

Molar heat of condensation

A

Energy to go gas to liquid

Exothermic

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10
Q

Freezing phase change

A

Exothermic

Liq to solid

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11
Q

Melting

A

Endothermic

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12
Q

Sublimation

A

Solid to gas

Endothermic

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13
Q

Deposition

A

Gas to solid

Exothermic

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14
Q

Phase change opposites

A

Melting & freezing
Vaporization & condensation
Sublimation& deposition

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15
Q

Heating curve graph

A

Doesn’t change temp in a phase change

Only in same phase

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16
Q

System

A

The 1 thing that changes when heated up - breaking of the bonds

17
Q

Surrounding

A

Things around the system that are affected

18
Q

Calories

A

Energy required to raise one gram of H20

19
Q

Food calorie

A

= to 1000 calories

20
Q

Hest capacity

A

Heat required to raise the temperature of an object 1 degree

21
Q

Things with a high heat capacity

A

Heats up slowly
Cools down slowly
Large amount of energy to change temperature

22
Q

Things with a low heat capacity

A

Small amount to change temp
Heats up quickly
Cools down quickly
Readjusts to new conditions

23
Q

Q= mcp🔺t

A

Energy = mass heat capacity t final - t initial

24
Q

Heat / Enthalpy

A

Flow of energy from hot to cold

25
Q

Why does the temperature not increase during a phase change

A

The intermolecular bonds are breaking and spreading fathr apart

26
Q

Calorimetry

A

Heat of system = - heat of surrounding

Chemistry L1 Ms.Yocis (8 decks)

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