Chm1025

Front 1

101.3 Joules

Back 1

1atm*L

Front 2

1000J

Back 2

1kJ

Front 3

1kcal

Back 3

1Cal

Front 4

1Cal

Back 4

1000cal

Front 5

1atm

Back 5

760torr

Front 6

Exothermic

Back 6

If energy is transferred to the surroundings from the system. g->l->s

Front 7

Endothermic

Back 7

If energy is transferred to the system from the surroundings. s->l->g

Front 8

ΔEsystem

Back 8

q+w

Front 9

work

Back 9

-P*ΔV(atm*L)

Front 10

Work expands

Back 10

work done by the system on its surroundings gives OFF energy, decreases, expands(-)

Front 11

work compresses

Back 11

Work done by the surroundings on a system gives IN energy, increase, compress(+)

Front 12

Heat of substance

Back 12

Can be either absorbed(+) or released(-)

Front 13

q(heat)

Back 13

m*C*ΔT

Front 14

heat released

Back 14

heat is released by the system to the surroundings if q is negative

Front 15

heat absorbed

Back 15

heat is absorbed by the system from the surroundings if q is positive

Front 16

ΔH

Back 16

q

Front 17

ΔHrxn

Back 17

Δfinal enthalpy- Δinital enthalpy = ΔErxn + w

Front 18

heat is esentially the same as..

Back 18

enthalpy

Front 19

ΔH is extensive or intensive?

Back 19

extensive(amount)

Front 20

standard molar enthalpy of formation(ΔH°f)

Back 20

is the enthalpy change for the formation of 1 mol of a compound directly from its component elements in their standard states.

Front 21

standard state

Back 21

c(graphite), S8, P4

Front 22

what is calorimetry?

Back 22

the study of heat transfer

Front 23

ΔH°

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Σn[ΔH°f(products)] - Σn[ΔH°f(reactants)]

Front 24

what is specific heat capacity?

Back 24

is the amount of heat needed to change the temperature of 1 gram of substance by 1 degree Celsius.

Front 25

specific heat(C) =

Back 25

q/m*ΔT

Front 26

qsystem = -qsurroundings ; qmetal= -qwater

Back 26

is used when there are 2 different temperatures

Front 27

ΔH = qrxn/quantity = kJ/g = kJ/mol

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is used when there is only 1 temperature change

Front 28

qrxn = -qsoln ; qsoln= (m)soln*(c)soln*ΔTsoln

Back 28

is used when you're given the heat capacity of the solution

Front 29

qrxn = -(qbomb + qwater)

Back 29

when the heat capacity of the calorimeter or bomb is given

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qbomb =

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(c)bomb * ΔT

Front 31

qrxn = -qbomb

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if no mass of water or solution is given

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Percent yield

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actual yield/ theoretical yield * 100%

Front 33

qrxn = -(qbomb + qsoln)

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when the heat capacity of the calorimeter/bomb and heat capacity of solution is given

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electrolytes strong

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strong acid, strong base, and a soluble salt. dissociate completely in solution

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EX: strong electrolytes

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NaOH, HCl, HBr, Ba(OH)2 or H2SO4)

Front 36

electrolytes weak

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weak acid, weak base, insoluble salt, do not dissociate completely in solution

Front 37

EX: weak electrolytes

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NH3, HF

Front 38

nonelectrolyte

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does not dissociate in solution; ex: covalent species, hydrocarbons

Front 39

EX: nonelectrolyte

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C6H12O6, HCCCH2CH3, CO2

Front 40

binary acid

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has hydrogen & nonmetal ; Hydro_____ ic Acid

Front 41

oxyacid

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has hydrogen and an oxyanion ; oxyanion ending with -ate _____ ic Acid ; -ite ______ ous Acid

Front 42

strong acids

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HClO4, H2SO4, HNO3, HCl, HBr, HI

Front 43

strong bases

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LiOH, NaOH, KOH, RbOH, CsOH, CaOH2, SrOH2, BaOH2

Front 44

weak acid

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HF, HCN....

Front 45

base

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OH1-

Front 46

acid

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H1+

Front 47

weak base

Back 47

FeOH3, MgOH2, NH...