8/8/2019 1er bac physi

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..: ..... :

:

: :: ..........................

) 7(:I- ml50=V)S( III .l / mol1=C FeCl 3

(FeCl 3 , 6H 2O) .-1 -2 )()(2)(:

3)(23 ................)6,( lll O H C FeO H FeC aqaqs ++

+

-3 -4 III

II- L72=V C80= hPa1013=P.-1 -2 V

-3 : M(H)=1g/mol ; M(O) =16g/mol ; M(Cl) =35g/mol ; M(Fe) = 56g/mol ; R = 8,314 (SI) )13(:

1: d = 20cm 45 .

-1 -2 -3 -4

2:

(S) m=100g ABCD ( -1 ). .BVB=4m/s A -1.1

B APW

)(v

-1.2 AB-1.3 (S) AB -1.4 ABCD -2 BCD.-2.1

C BPW

)(v

DC PW

)(v

2.2- h r h -2.3 -2.4 CD

:AB = 2mg = 10N/kgh = 1m = 603:

)S( kg,50=m s / rad20=2: * r =10cm g = 9,8N/Kg30 =

. -1 -2 BA-3 T AB-4 2-5 -6 F = 50N

20 .

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