8/8/2019 devoir libre 01 2 eme PC SM

1/4

Allal mahdade http://sciencephysique.ifrance.com Page 1

01

2007 2008 *

1: V 1 ,41 ====

AV 60 m ====

AC 5 ,0 mol / ==== m 1 , 25 g . ====

. :

3 2 3 3 2 2 2 CH CO H HCO CH CO CO H O + + + + + + + + + + + +

t :

1 )

2

25 C . = = = =

.

3

.4 :

.

.4 :

A

C 3 ,0 mol / ==== 25 C = = = =

A

C 3 ,0 mol / ==== 20 C = = = =

:M(Na)=23g/mol , M(H)=1g/mol , M(O)=16g/molR=8,314m3.Pa.Kmol-12:

.

I .1 .2 .

II .

8/8/2019 devoir libre 01 2 eme PC SM

2/4

Allal mahdade http://sciencephysique.ifrance.com Page 2

:Vair=340m/s Vmer. salves

. ( d )

. A B B.

1 tAtB.

d .

2 :air

air

VV

d V .====

.

3 d

.

=f(d)) 2(3 1 d

:

1 1

air eau

dV V

=

3 2 .

3 3

. .Vair=340m/s.

8/8/2019 devoir libre 01 2 eme PC SM

3/4

Allal mahdade http://sciencephysique.ifrance.com Page 3

III . m/sVeau=1,50.103.

=200kHz

. Veau.

. p.

Ap xx B) 3(

. (cho).

)4( A.

.

)2( .

1

. 2

.

3 pVeau.4 p A.

3I 1 A n i

2A

8/8/2019 devoir libre 01 2 eme PC SM

4/4

Allal mahdade http://sciencephysique.ifrance.com Page 4

2 0

i A=60

II ( )2

Bn A

= +

A=1,502SIB=4652SI ABC.

AB i AC BC,i.

1 .589,3j nm =

2 ii.3 A A=60

.SI IR i . rr

4 . 486,1B nm =. Dj

DB.4:

LC=5 n=6.105 .

1 2 .:568Ve nm =

.3 E .4 .4 1 0 = .4 2 1.

: 750R nm = 390V nm =200731