Mécanique / Chromatographie / Distillation Flashcards

1
Q

Le référentiel

A

Ce que l’on considère comme immobile

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2
Q

Vitesse moyenne : v =

A

v = distance parcourue / durée du parcours

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3
Q

1 m.s-1 =

A

3,6 km.h-1

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4
Q

Intensité

A

P = m x g

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5
Q

P = m x g
P?
m?
g?

A
P = poids de l'objet en Newton 
m = masse de l'objet en Kg
g = gravité de la planète en N.kg-1
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6
Q

Force gravitationnelle f =

A
f = G x (mA x mB)/ d^2
G = constante de la gravitation
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7
Q

Gravité à la surface d’une planète (g)

A
g = GM / R^2
M = masse de la planète
R = rayon de la planète
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8
Q

Volatil

A

Qui s’évapore facilement et qui a une température d’ébullition basse

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9
Q

Ce qui sort de l’appareil à distiller =

A

Le distillat

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10
Q

Vin =

A

Eau + éthanol + plein de choses (ex : colorants)

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11
Q

Phases et températures de la distillation

A

Début = 16ºc
Ébullition = 70ºc
1ères gouttes = 80ºc
Fin = 90ºc

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12
Q

Le solide poreux en chromatographie =

A

Phase fixe ou absorbant

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13
Q

Le fluide en chromatographie =

A

Phase mobile ou éluant

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14
Q

La chromatographie permet de

A

Séparer le constituant d’un mélange homogène

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