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UE1 > thermo > Flashcards

thermo Flashcards

1
Q

fraction molaire Xi

A

= Ni/∑ iNi

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2
Q

ni c’est

A

nmbr de moles de Ai

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3
Q

somme xi =

A

1

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4
Q

concentration molaire a l’unite

A

mol. L-1

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5
Q

Ci =

A

Ni / V = Ai

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6
Q

pi = Xi P c’est formule de

A

pression partielle d’un Ai

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7
Q

variables extensives sont

A

variables proportionnelles a la qte de matiere

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8
Q

Les 6 v extensives:

A 
Chaleur
Travail
Volume
Energie interne
Enthalpie
Entropie
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9
Q

extensives sont

A

additives

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10
Q

intensives sont

A

non additives

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11
Q

nomme 5 v intensives

A 
pression
temperature
concentration
fraction molaire
densite
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12
Q

equilibre est defini comme

A

T, P sont constants

composition ne varie pas avec temps

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13
Q

nomme 3 systemes

A

ouvert, ferme, isole

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14
Q

fermé c’est p e

A

reaction chimique

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15
Q

isolé c’est

A

notre univers + ampoule scellee

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16
Q

ouvert c’est

A

cellule vivante

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17
Q

transfert d’energie sans echange de matiere

A

fermé

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18
Q

0 C =

A

273 K

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19
Q

unite de T

A

K

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20
Q

1 atm = …. Pa

A

1.013 . 10-5 Pa

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21
Q

1,013 . 10 -5 Pa = … KPa

A

101, 3 . 10-5 kPa

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22
Q

Equation des gaz parfaits

A

PV = nRT

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23
Q

Si Pa, le volume va etre en

A

m3

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24
Q

si atm, la V va etre en

A

L

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25
Q

Si Pa et m3, le R va etre

A

8,31 J.mol-1. K-1

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26
Q

Si L et atm, le R va etre egale a

A

0,082 L.atm.K-1

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27
Q

Isochore

A

volume reste constante

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28
Q

Isobare

A

P reste constante

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29
Q

Isotherme

A

T reste constante

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30
Q

adiabatique

A

aucune transfert thermique

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31
Q

1 Joule est egal

A

Pa*m3

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32
Q

1 cal =

A

4,18 J

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33
Q

1 eV =

A

1,6. 10-19 J

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34
Q

capacite calorifique molaire est egale a

A

Cp
Qp = n * Cp * deltaT
Qp = n* Cp * (Tf - Ti)

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35
Q

Cp c’est

A

capacite calorifique molaire a pression constante

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36
Q

Cp -

A

qte de chaleur pour elever de 1 K a T donnee la T d’un mole de matiere

37
Q

Cp: unité

A

J. mol-1. K-1

38
Q

calorie -

A

qte de chaleur pour elever de 15 a 16 C 1 gram d’eau

39
Q

chaleur specifique

A

c

40
Q

chaleur specifique est defini

A

qte de chaleur pour elever de 1 K un g de matiere

41
Q

unite de c

A

J.kg-1. K-1

J. g-1. K-1

42
Q

Q =

A

cm delta T

43
Q

c =

A

Q/ m*delta T

44
Q

chaleur latente

A

L

45
Q

L est

A

qte de chaleur pour passer 1 mole de compose a autre etat physique

46
Q

Qp =

A

nCpdeltaT

47
Q

fonctions d’etat ne font pas attention aux

A

changements intermediaires

48
Q

W et Q ne sont pas

A

fonctions d’etat

49
Q

W represente

A

le travail macroscopique

50
Q

si volume = constant, reaction est dite …. et delta U = …

A

isochore

Qv

51
Q

Qv: unite

A

J.mol-1

52
Q

mol-1 signifie

A

par mole d’avancement de la reaction

53
Q

delta P =0 est

A

calorimetre

54
Q

delta H =

A

delta U + PdeltaV

55
Q

delta r H =

A

Qp

56
Q

delta rH = unite

A

J.mol-1

57
Q

Qp est egale a

A

chaleur absorbee/degagee

58
Q

si T = cte

A

PdeltaV = RT delta n

59
Q

delta H =

A

delta U + RT delta n

60
Q

RT delta n egal au 0 si

A

aucune phse gazeuse/ nmbr de moles reactis = nmbr de moles produits

61
Q

quand T n’est pas precisee, on prend

A

25 C = 298 K

62
Q

P=1 bar, T > 100 C, eau est

A

gazeuse

63
Q

P = 1 bar, T<100 C, eau

A

liquide

64
Q

delta n H2O gaz =

A

-1/2

65
Q

delta n H2O liquide =

A

-3/2

66
Q

I2 - standard

A

solide (S)

67
Q

Br2 sous forme

A

liquide (L)

68
Q

Na sous forme

A

solide (S)

69
Q

O, H, N -

A

gazeux

70
Q

C(gr) -forme

A

standard

71
Q

combustion

A

combustiblE oxydé

comburanT reduiT

72
Q

methane. acide methanoique et methanal peuvent etre

A

en r de combustion

73
Q

delta f H d’un corps simple dans son etat s de r =

A

0

74
Q

variation d’enthalpie standard de f d’un compose

A

delta F H

75
Q

delta r H n’est pas 0

A

si les corps simples ne sont pas dans leur etat de reference

76
Q

1/2 O2 et H2 ce sont

A

corps simples delta f H

77
Q

O (g) et 2 H (g)

A

atomes isoles gazeux 2 El (o-h)

78
Q

signe de l’entropie

A

S

79
Q

unite de l’entropie S

A

J.mol-1.K-1

80
Q

entropie, contrairement a l’energie,

A

ne se conserve pas

81
Q

entropie est une fonction d’etat?

A

VRAI

82
Q

variation d’entropie depend de chemin suivi

A

FAUX

83
Q

3 principe de thermodynamique:

A

entropie molaire standard d’une substance parfait cristalline est nulle au zero absolu soit T= 0 K

84
Q

delta S est egale au

A

n*Lv / Tv

85
Q

si deltaS > 0, deltaH >0 , …

A

defavorisee delta H, mais favorisee par deltaS

86
Q

si delta S <0, deltaH <0,

A

favorisee delta H, defavorisee par deltaS

87
Q

delta G > 0. R est ….

A

non spontanee

88
Q

delta G < 0. R est …

A

spontanee

89
Q

delta G =0. R est …

A

en equilibre

UE1 (1 decks)

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