Kinetik Gas 2

52
10/11/15 1

Transcript of Kinetik Gas 2

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10/11/15 1

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POKOK BAHASAN BAB 5

PENDAHULUAN

GAS IDEAL(DESKRIPSI MAKROSKOPIS)

GAS IDEAL (DESKRIPSI MIKROSKOPIS) GAS SEJATI (GAS NYATA)

PERSAMAAN GAS NYATA

BIDANG p-V-T GAS IDEAL DAN GAS NYATA

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10/11/15 3

INDIKATOR

M!"#$%&$! '%$$! $&*%&*p+%

M!"#$%&$! '%$$! +&*%&*p+%

T*+ &+!,+& $%

G$% +.$# %'$$+ .%&+p%+

$&*%&*p+&

G$% +.$# %'$$+ .%&+p%++&*%&*p+&

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10/11/15 4

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S,,% +!$& $! .+,,%&$!

.+%., $!$! $&$!

!$&$! %#$!$!

!$p$ .+&+$!4 '$$+$! *#

%,#$ +!$& 6$!+

.+,,%&$!4

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10/11/15 7

Pendahuluan

Kuantitas makroskopis 

 A.$#$ &$!,+,$% $! #$!%!

.+$%*%+$%+&$! .!$! ,$!$p$! +!.$(%!% *8 p9p,+*!)

M+%$#!$ ,&$!$!: ,p$, : !+

.$#$ .$! !,*p+; M'!,& 9$'$! +# +#

p!,$$! ,*.+!$+&$

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10/11/15 <

Kuantitas mikroskopis  A.$#$ &$!,+,$% $! !"#$%&$! $,*

.$! *#&# $! '!,& %+%,

M+%$# #$": !+: $%%$: *!,%.,

M'!,& 9$'$! +# &$!+&$

%,$,+%,+&

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10/11/15 =

 Teori kinetik gas

Teori kinetik gas memberi jembatan

terhadap tinjauan partikel secara

makroskopis dan secara mikroskopis P$&$+$! & &$!+&$ %9$$

%,$,+%,+& !,& !+,! '%$$!-

'%$$! p$.$ $,* %9$$ #'+ #$%

T&$!$!: ,p$,: &$#* "!+% .$!

!+ .$#$

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10/11/15   9

Gas ideal ditinjau dari deskripsimakroskopis

Dibahas dalam

 Termodinamika

(mengingat kembali)

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10/11/15 10

 Tekanan Gas deal

R*', B*#

>"+&$ $%%$ .$! ,p$, %$, $%

.+"$$ &*!%,$! .$! *# $% .+'$

,!$,$ ,&$!$! $! .+&#$&$! $%

 "$ ''$?

 H& B*# pV @ &*!%,$!

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10/11/15 11

$#% .$! G-L%%$9

> "+&$ $% .+p*%% .!$! ,&$!$! &*!%,$!: $&$

*# $% $.$#$ %'$!.+! .!$!

,p$,?

H& $#% .$! G-L%%$9

p/T @ K*!%,$!

 

H& B* G-L%%$9

pV/T @ K*!%,$!

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pV/T @ K*!%,$!J+&$ $%%$ $% .+!$,$&$! .$#$ *# (!):$&$

&*!%,$!,$! ,%', @ !R .!$! R ($% .+,!,&$!

.$#$ &%p+!)

nR T

 pV

= $,$ pV @ !RT

Avogadro bilangan: NBoltzman,konstanta:k 

!/"10#1,$% NR k 

0

0

2$−==

pV @ N&T

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10/11/15   1$

Deskripsi !akroskopis Temperatur Gas deal

T*, *# ,,$p

170:10

170:00

15:0

15:=0

15:70

N2

H2

H2

P, 

T(P, )

0 20 C0 70 120

V

tr 0 ptr 

i   & p

 p'lim" 2($,1)T

→=

Tp$, 

 $% +.$#

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10/11/15   1*

Contoh soal

S$, $% +.$# p$.$ ,&$!$! 13< $, .$! ,p$,2<0 *#!$ 2 3; B$p$&$ *# $! .$p$,

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$,*%8 .$! ,p$, 500

D+&,$+

P1 @ 13< $,: T1 @ 2<0 2<3 @ 300K: V1@ 2 3

P2 @ 1 $,: T2 @ 500 2<3 @ 323K: V2@ 4

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10/11/15   15

S*#%+

P%$$$! $% +.$# .$+ H&; B*# G L%%$9

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10/11/15   1)

*!,* %*$# 2S'$ '$! *'+# *#!$ 5:7 F 103 99 .++%+

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@ 2 p%+ 1C:< p%+ @ C3: < p%+

Tp$, (T1) @ 300 K: T2 @ 320 K

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10/11/15   +N-.-."AN B.. 2011 1(

S*#%+

H& $#% .$! G-L%%$9

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10/11/15   1%

!enentukan nilai "

"ara 1#

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11" mollatm0,0%2

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nR 

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 pV=

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10/11/15   19

"ara $#

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T &!$+&$! %

( #+,)10

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p

p ($,)

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10/11/15   20

 A,$ .$p$, &+,$ ,#+%

V1 @ V0 1 1/2<3 T

 A,$ V1 @ V0;T/2<3

&2($

T2($'V1

+=

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10/11/15   21

K.+$! $% !$#$+ p*%% +%*,$# .$+ &$.$$! 2& &$.$$! 3 '#$& H&; B*#

p0V1 @ p;V$,$

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2($

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p ($,)

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T1

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10/11/15   22

S+!$ &+,$ .$p$,&$!

T2($

22,*#n p pV 0=

T&

" 2($

l/mol22,*#atm1'n pV=

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$% !+%$# R; A,$ .$p$, &+,$ ,#+%&$!

R @ 0:0=2 $,;l;*#-1K-1

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10/11/15   2$

"ara %# melaui eksperimen

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10/11/15   2*

H$%+# &%p+! &.+$! .+,$'#&$! %'$$+ '+&,

P$.$ % T @ T1: ! *# $% H2: N2: O2 .##

@ V/! 1 2 3 +

p p1 p3 p3 ; p+

p p11 p22 p33 ; p++

P$.$ % T @ T2: T @ T3: T @ TC: .%, .+.$p$,&$! ,$'#$! %$$

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10/11/15   25

H$%+# &%p+! ,%', "+&$ .+'$, .$#$ $8+& p++ 

,$.$p p+

L!&!$! $8+& .$p$,

.+!$,$&$!

pV @ 8(p0)

  @ A0  A1p A2p2 A3p

3;;

D+%',

p%$$$! $% !$,$

&%p$!%+ ++$# .$+! pV .$#$ p

 A1  &*8+%+! ++$#

0 C0 =0 120 170 p($,)

pV

 A0 (1)

 A0 (2)

T1

T2

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N2

O2

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10/11/15   2)

T+,+& A0  .+p*# .!$!

&%,$p*#$%+ &!+#$+ p 0S+!$ '#$&

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pV

 A0 (1)

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T1

T2

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N2

O2

H2

N2

O2

 A0  B$!,! p$.$ T ,,$p+ ,+.$& '$!,! p$.$ "!+% $,: %+$ A0  .+%', "$ &*!%,$!,$ $%

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10/11/15   2(

"ara 4#

P%$$$! p!!,$! $% +.$# .!$! !!&$!

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→=

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=

TA2($,1)

VTp pVlim 0

tr tr 

0 p==

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V pA   tr tr 

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10/11/15   2%

H$%+# p!&$! (p,(   ; V,( ) %9$$ '#$! &$#+ !,&

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10/11/15   29

Gas ideal ditinjau dari deskripsimikroskopis

Dibahas dalam

teori kinetik gas

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10/11/15 30

 A%%+ ,!,$! $% +.$#

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10/11/15 31

S$ ,'&$!: '$+& $!,$p$,+&# $p! .!$! .+!.+!

T"$.+ %9$$ #!,+! %p!$

G$% +.$# ,.++ $,$% p$,+&#

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2vm2

1   =k 

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10/11/15 32

G&' D&

#as ideal berupa gas atom tunggal

#as ini tidak dapat menjadi cair ataupun padat

!olekul$molekuln%a berupa titik massa

PERTANYAAN :

& Apa %ang 'imaksud dengan !olekul Berupa Titik !assa( 

)& Sebutkan Contoh #as *deal(

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10/11/15 33

Gas ideal %'!$!$ ,+.$& $.$ .+ $#$: ,,$p+ 

.+.&$,+ *# $%-$% #+$

H: N: A: K: : R.

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10/11/15 $*

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Tekanan

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10/11/15   +N-.-."AN B.. 2011 $5

Tekanan

B$$+$!$ p$!.$!$!,*+ &+!,+& $%

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10/11/15 37

K#$"$! *#&#

K#$"$! $,$ *#&# ()

K#$"$! $&$ p$,$ &$.$, (()%)

 N

vv

2

rms ∑= $,$ 2

 @ N;%

2

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10/11/15 3<

K#$"$! %'$  *#&#

.$p$, .+$+&$! !"$.+ F::.$!  %+!$ 

∑ ∑ ∑∑   ++=   2222 z  y x   vvvv

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z

2

3

2

#

2 v Nvvvv   =++=∑ ∑ ∑∑

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10/11/15 3=

rms2

#22 v Nv$v   ==

∑ ∑

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$1vvv   ===∑ ∑ ∑

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10/11/15 3

F

 A

l

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10/11/15 C0

 A&+'$, ,'&$! ,%',: p$,+&# +, !.$p$,

p'$$! *!, %'%$

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F

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l

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10/11/15 C1

J$$& $! .+,p p$,+&# !,& p*%% .$ &$#+

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v

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1   3=

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10/11/15 C2

K$!$ %,+$p &$#+ ,"$.+ ,'&$!: .+!.+! !+$

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3

mv

2

v42mv

t

+−==

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t

+   2

3N

2

32

2

31

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+++=   

  

l

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10/11/15 C3

D!$! !!$&$! p%$$$!

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10/11/15 CC

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10/11/15 C5

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10/11/15 C7

Tp$, 

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Page 47: Kinetik Gas 2

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10/11/15 C<

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Page 48: Kinetik Gas 2

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10/11/15 C=

$k 

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10/11/15 C

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10/11/15 50

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10/11/15 51

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