UNIVERSIDAD NACIONAL MAYOR DE SAN MARCOS (UNIVERSIDAD DEL PERÚ, DECANA DE AMÉRICA)
FACULTAD DE QUÍMICA E INGENIERÍA QUÍMICA ESCUELA ACADÉMICO PROFESIONAL DE INGENIERÍA QUÍMICA
DEPARTAMENTO ACADÉMICO DE FISICOQUÍMICA
LABORATORIO DE FISICOQUÍMICA PRÁCTICA PRÁCTICA N°5: TENSIÓN SUPERFICIAL
GRUPO/HORARIO
:
MIERCOLES/ 8:00 – 11:00 AM
PROFESORA
:
Pu! P!"#$, M#%#'
FECHA DE ENREGA :
1 N$*+#-%# . 01
ALUMNO(') 150600
#%%#%$' R$"! A2-!. P#%3#4$
15060058
:
D2!7 Y!"!"2 E&'$ !*+#%
L+! – P#%9
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INDICE
1. INTRODUCCION......................... INTRODUCCION............................................................. .......................................... ...... 3 2. RESUMEN.......................... RESUMEN.................................................... .................................... ..................... ............. ..4 4 3. OBJETIVOS.................................. OBJETIVOS.......................................................................... ........................................ 5 4. PRINCIPIOS TEORICOS.......................... TEORICOS............................................. ............................. ............ ..5 5 5. PARTE EXPERIMENT EXPERIMENTAL..................... AL................................ ..................... ..................... .............10 ..10 5.1. Materiae!" e#$i%&! ' rea(ti)&!.......................................10 5.2. Pr&(e*i+ie,t& e-%eri+e,ta............................................10 . TABLA DE DA DATOS........................... TOS...................................................... .................................... ......... 11 /. CALCULOS...... CALCULOS.................................. ....................................................... ....................................... ............12 12 . TABLA DE RESULT RESULTADOS........................ ADOS............................................... .............................. ....... 1 . DISCUSION DE RESUL RESULT TADOS........................... ADOS....................................... .................... ........ 1/ 10. CONCLU CONCLUSIONES.......................... SIONES..................................................... ..................................... .......... 1 11. RECOMENDACIONES........................ RECOMENDACIONES................................................... ................................ .....1 1 12. CUEST CUESTIONAR IONARIO.... IO......... .......... .......... .......... ................... ............................ .........................20 ...........20 13. BIBLIORAIA................................................................. BIBLIORAIA.................................................................22 22 13. ANEX ANEXOS... OS........ .......... .......... .......... .......... ................ ......................... ............................ ....................22 ......22
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1. IN INTR TROD ODUC UCCI CION ON La te! te!"# "# !$%e !$%e&' &'(" ("a) a) !e e*%&e *%&e!a !a +e ,$(,$(-a! a! ,a ,ae e&a &a! ! "() "()$!" $!"/e /e e $e!t&a /"+a (0t"+"aa 0!e&/a,0! 2e#,e0! 3$e 0! ,a"'e!ta )a e*"!te("a +e +"(-0 te!"# 4a !ea a) 0!e&/a& (a,"a& "!e(t0! !0&e e) a$a 60ta& $a a$7a !0&e )a !$%e&'("e +e $ )83$"+0 0 )a 20&,a("# +e )a! $&$7a! 0 %0,%a! +e 7a#. Ua ,ae&a +e +e,0!t&a& )a e*"!te("a +e )a te!"# !$%e&'("a) e! ,e+"ate )a (a%")a&"+a+ 3$e +e!a&&0))a&e,0! e )a %&e!ete e*%e&"e("a. E) ,9t0+0 +e e)e/a("# (a%")a& e! $0 ,$4 $t")"a+0 %a&a )a +ete&,"a("# +e) (0e'("ete +e te!"# !$%e&'("a) %0& !$ !e("))e 4 e*a(t"t$+ e) ($a) !0)0 &e)a("0a )a +"2e&e("a +e a)t$&a! e*"!tete! et&e e) "/e) +e) )83$"+0 e e) &e("%"ete 4 e) "/e) +e) )83$"+0 e e) (a%")a&.
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;. RESUMEN E )a !"$ !"$"e "et te e e*%e& *%e&"e "e( ("a "a <=T <=Te!" e!"# # S$%e S$%e&' &'(" ("a) a)== == &ea ea)" )"a a+a +a a )a te,% te,%e& e&at at$& $&a a a, a," "e ete te +e T °C °C %&e! %&e!"# "# +e >5? >5? ,,@ ,,@ 4 ; +e @$,e+a+ &e)at"/a +e,0!t&a&e,0! )a e*"!te("a 4 /a&"a("# +e )a te!"# !$%e&'("a) +e )0! )83$"+0! e e!te (a!0 e) a$a 4 ,eta0) e 2$("# +e )a te,%e&at$&a %a&a e) ($a) ,e+"ate $ !"!te,a (e&&a+0 t$0 4 ta%# ,e+"&e,0! )a /a&"a("# e e) "/e) +e a)t$&a +e) )83$"+0 a)(aa+0 e $ (a%")a& "t&0+$("+0 a) !"!te,a +e!+e )a te,%e&at$&a +e 1 °C -a!ta )0! 5 °C e "te&/a)0! +e 1 °C (a+a $0. F"a),ete ,e+"ate )0! ()($)0! (0&&e!%0+ (0&&e!%0+"ete "ete!! +ete&," +ete&,"a&e a&e,0! ,0! e) (0e'("e (0e'("ete te +e te!"# te!"# !$%e&'("a) !$%e&'("a) e*%e&",eta)e! tat0 %a&a e) a$a 4 %a&a e) ,eta0) 4 (0,%a&a&e,0! )0! /a)0& /a)0&e! e! 0te" 0te"+0! +0! (0 )0! +at0! +at0! te#&"( te#&"(0! 0! e(0t e(0t&a+0 &a+0!! e ta)a! ta)a! %a&a -a))a& e) %0&(eta7e +e e&&0& (0,et"+0 +$&ate e) e*%e&",et0.
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. OB OBHE HETI TI OS •
•
•
Dete&,"a& )a e*"!te("a +e )a te!"# !$%e&'("a) e )0! )83$"+0!. @a))a& @a)) a& e) (0 (0e' e'(" ("e ete te +e te! te!"# "# !$%e !$%e&' &'(" ("a) a) %a&a %a&a e) a$a a$a 4 e) ,eta0). Dete&,"a& )a /a&"a("# +e )a te!"# !$%e&'("a) e 2$("# +e )a te,%e&at$&a.
J. PRI PRINCI NCIPIO PIOS S TEOR TEORICO ICOS S
#'+ Su;#%<+!. S" !e +et"ee a 0!e&/a& $ (-a&(0 +e a$a e!ta(a+a 0ta& 3$e e e))a ("e&t0! +e "!e(t0! ta)e! (0,0 )0! a($+0! a&aKa! (a,"a !0&e e) a$a.
La "te&a(("# +e )a! %a&t8($)a! e )a !$%e&'("e +e) a$a -a(e 3$e e!ta !e %&e!ete (0,0 $a !$%e&'("e e)!t"(a )0 3$e ",%"+e 3$e !e %$e+a "&e!a& a) !e0 +e) )83$"+0. Ta)/e Ta)/e !e -a& %&e$ta+0 %0& 3$9 !e 20&,a 20&,a )a! 0ta!
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La! 2$e&a! +e te!"# !$%e&'("a) t"e+e a ,"","a& )a ee&8a e )a !$%e&'("e +e) 6$"+0 -a("e+0 3$e e!ta! tea $a te+e("a a $a 20&,a e!29&"(a .O %0& 3$e e) ,e&($&"0 0 !e +"!%e&!a 4 !"e,%&e 3$e+a (0,0 e!2e&a! ($a+0 !e +e&&a,a 0 (0,0 e! 3$e !e 20&,a )a! $&$7a! +e 7a# (0 )a! 3$e 7$ea )0! "K0!. T0+0! e!t0! -e(-0! !e +ee a $a %&0%"e+a+ +e )0! )83$"+0! +e0,"a+a te!"# !$%e&'("a). E!t0! -e(-0! 3$e !e& 0!e&/a e )a /"+a +"a&"a !e %&e!eta +$&ate )0! %&0(e!0! +e %&0+$(("# %0& e7e,%)0 )a 20&,a("# +e e!%$,a!(e&/ea 7a# et(. e e) +e!%)aa,"et0 +e ("e&ta! a/e! 4 0t&0! a",a)e! e e) a$a e e) 2e#,e0 +e )a (a%")a&"+a+ 3$e %e&,"te a )a! %)ata! ))e/a& a$a +e!+e )a! &a8(e! -a!ta )a %a&te ,! a)ta +e) ta))0 4 )a! &a,a! a t&a/9! +e) *")e,a e) 3$e )0! a+-e!"/0! 4 %ea,et0! ))e/e a (a0 e'("ete,ete !$ 2$("# 4 )a !a&e ))e$e a )0! +"/e&!0! #&a0! +e) ($e&%0. Ua ,0)9($)a a) "te&"0& +e $ )83$"+0 e!t !0,et"+0 a 2$e&a! at&a(t"/a! +e +e0, 0," "a+ a+a! a! 2$e& 2$e&a a!! +e (0 (0-e -e!" !"# # e t0+a t0+a!! )a! )a! +"&e +"&e(( (("0 "0e e! ! 0 -a"e+0 te+e("a e "$a +"&e(("# !"e+0 )a &e!$)tate $)a e (a,"0 $a ,0)9($)a $"(a+a e )a !$%e&'("e +e) )83$"+0 !$2&e )a a(("# +e 2$e&a! +e (0-e!"# -a("a aa70 %e&0 0 -a("a a&&"a +e )a !$%e&'("e e!t0 e!t0 0&"" 0&""a a $a 2$e&a 2$e&a &e!$) &e!$)tat tate e %e&%e %e&%e+"( +"($)a& $)a& a )a !$%e&' !$%e&'("e ("e 3$e t"e+e a 7a)a& a )a! ,0)9($)a! -a("a a+et&0 +e) L83$"+0 )0 3$e 0(a!"0a 3$e )a !$%e&'("e !e te!e (0,0 !" 2$e&a $a %e)8($)a e)!t"(a e!ta e! )a %&0%"e+a+ +e0,"a+a te!"# !$%e&'("a). L0! )83$"+0! 3$e t"ee 2$e&a! "te&,0)e($)a&e! &a+e! t"ee te!"0e! !$%e&'("a)e! &a+e! (0,0 e) ,e&($&"0 e) a$a. a$a .
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CAPILARIDAD La te!"# !$%e&'("a) %&0+$(e $ 2e#,e0 +e0,"a+0 (a%")a&"+a+ e) ($a) !e ,a"'e!ta %0& )a e)e/a("# 0 +e!(e!0 +e $ )83$"+0 e $ t$0 (a%")a& 0 e %)a(a! 7$ta!. La (a%")a&"+a+ e! %&0+$("+a %0& +0! t"%0! +e 2$e&a 2$e&a!: !: $a +e at&a((" at&a(("# # "te& "te&,0) ,0)e($ e($)a& )a& et&e et&e ,0)9($ ,0)9($)a! )a! !e, !e,e7 e7ate ate!! +e0," +e0,"a+ a+a a (0-e!" (0-e!"# # e!ta e!ta %&0%" %&0%"e+a e+a+ + %e&,"t %e&,"te e ,ate ,atee& e& 7$ta! 7$ta! a )a! ,0)9($)a! +e) )83$"+0 &e!"!t"e+0 %e3$eK0! e!2$e&0! +e te!"#. 0t&a 2$e& 2$e&a a (0 (00 0(" ("+a +a (0 (0,0 ,0 a+-e a+-e!" !"# # 3$e 3$e e! )a at&a at&a(( (("# "# +e ,0)9 ,0)9($ ($)a )a!! +"!t"ta! (0,0 %0& e7e,%)0 )a 3$e 0($&&e e e) (a%")a& et&e )a !$%e&'("e +e /"+&"0 4 )a %e)8($)a +e) )83$"+0 3$e )0 ,07a. De%e+"e+0 +e )a! ,a"t$+e! &e)at"/a! +e )a (0-e!"# +e) )83$"+0 4 +e )a a+-e!"# +e) )83$"+0 )83$"+0 a )a! %a&e+e! %a&e+e! +e) t$0 !e %&0+$(e )a e)e/a("# e)e/a("# 0 +e!(e!0 +e!(e!0 +e) )83$"+0 e e) t$0 (a%")a&. S" )a a+-e!"# e! ,! 2$e&te 3$e )a (0-e!"# a+-e!"# (0-e!"# )0! )83$"+0! a!("e+e e t$0! 3$e ,07a /e& '$&a ;.a -a!ta 3$e )a 2$e&a (0-e!"/a 3$e+a a)a(ea+a %0& e) %e!0 +e) a$a e e) t$0. S" )a (0-e!"# e! ,a40& 3$e )a a+-e!"# (0-e!"# a+a +-e! e!"# "# /e& /e& '$& '$&a a ;. ;. !$(e !$(e+e +e $a $a +e%& +e%&e! e!"# "# 4 )0! )0! )83$ )83$"+ "+0! 0! +e!("e+e e t$0! a )0! 3$e ,07a .La (a%")a&"+a+ t"ee ",%0&ta("a %a&a t$0! ,e0&e! +e 1 ,, +e +",et&0. Pa&a t$0! (0 +",et&0! ,a40&e! a 1 ,, e!te e2e(t0 e! +e!%&e("a)e
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C$a+0 )a! 2$e&a! +e (0-e!"# !0 &a+e! e &e)a("# a )a! 2$e&a! a+-e!"/a! )0! $)0! +e (0ta(t0 t"e+e a !e& &a+e!. C$a+0 )a! 2$e&a! +e (0-e!"# e &e)a("# a )a! 2$e&a! +e a+-e!"# )0! $)0! +e (0ta(t0 !0 %e3$eK0! &e!$)ta+0 e $a te+e("a +e) 6$"+0 a ,07a& )a !$%e&'("e. Se t"ee +"!t"t0! (a!0! +e $)0! +e (0ta(t0 et&e e) )83$"+0 4 $a !$%e&'("e !#)"+a
C$a+0 e) e*t&e,0 +e $ t$0 (a%")a& !e !$,e&e /e&t"(a),ete e $ )83$"+0 $a %e)8($)a a!("e+e %0& )a %a&e+ +e) (a%")a& -a!ta 3$e )a 2$e&a +e &a/e+a+ 3$e a(t$9 !0&e e) )83$"+0 e e) (a%")a& %0& e(",a +e )a !$%e&' !$%e&'(" ("e e e*te& e*te&"0& "0& (0t&a (0t&a%9! %9!e) e)a a te!" te!"# # e )a !$%e&' !$%e&'("e ("e +e) (a%") (a%")a& a& et0(e!:
M=4$&$ . !'#'$ !;+.!%
•
C$a+0 e) e*t&e,0 +e $ (a%")a& !e !$,e&e /e&t"(a),ete e $ )83$"+0 $a %e)8($)a +e 9!te a!("e+e %0& )a %a&e+ (a%")a& !"e+0 )a !$%e&'("e )"&e +e) )83$"+0 e e) (a%")a& +e 20&,a (#(a/a.
•
La (a$!a +e )a e)e/a("# +e) )83$"+0 e e) (a%")a& %$e+e e*%)"(a&!e %0& )a
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2
F 2 =π r ρgh
•
C$a+0 !e a)(aa e) e3$")"&"0 e3$")"&"0 )a! e($a("0e! !e "$a)a
γ %0& !e&
,$4 %e3$eK0 C0!1: γ
=
hρgr 2
#'+ 'u;#%<+!. '$.u+$#'>? •
E) (0,%0&ta,"et0 +e γ +e !0)$("0e! (0 &e!%e(t0 a )a (0(et&a("# !e %$e+e e*%&e!a& ,e+"ate &'(0!:
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!$%e&'("a)e! !$%e&'("a)e! 4a 3$e +"!,"$4e e) γ +e) a$a a "/e)e! ,$4 a70! a e (0(et&a("0e! (0(et&a("0e! %e3$eKa!. #'+ 'u;#%<+!. $$ 3u+ >? La >? La &e)a("# et&e γ 4 t e!t &e%&e!eta+a (0 e*a(t"t$+ %0& )a e($a("# Ra,!e4S-"e)+E0t0/0!: 2
M γ ( )3 =2,12 (t c −6−t ) ρ
#'+ 'u;#%<+!. %#.!4+*!>? γ 1 γ 2
=
h1 ρ1 h2 ρ2
5. PAR ARTE TE EPER EPERIMENT IMENTAL AL 5.1. Mate& Mate&"a)e "a)e! ! e3$"%0! e3$"%0! 4 &ea(t"/ &ea(t"/0! 0! •
C0(""))a T$0! (a%")a&e! P"%eta
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31 mm .
10 ° C
γ agua 72.75
dinas cm
= 30 mm .
0.99977 g
ml 0.99829 g
ml
10° C
γ agua =75.29 dinas / cm
Pa&a a&a e) a$a a °C 30 ° C
γ agua
20 ° C
γ agua
30 ° C
=
h30 ° C . ρagua
20 ° C
h20 ° C . ρagua
29 mm .
30 ° C
γ agua 72.75
dinas cm
=
30 mm .
0.99571
ml 0.99829
ml
30° C
γ agua =70.14 dinas / cm
Pa&a a&a e) a$a a J°C 40° C
γ agua
=
20 ° C
γ agua
g
40 ° C
h 40° C . ρagua
20 ° C
h 20° C . ρagua
0.99225
g
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Pa&a a&a e) e) ,e ,eta0) a0) a 1 1°C 10 ° C
γ metanol 20 ° C
10° C
=
h 10° C . ρmetanol 20 ° C
γ agua
h20° C . ρagua
16 mm .
10 ° C
γ metanol 72.75
dinas cm
= 30 mm .
0.80064 g
ml 0.99829 g
ml
10° C
γ metanol=31.12 dinas / cm
Pa&a a&a e) e) ,e ,eta0) a0) a ; ;°C 20 ° C
γ metanol 20 ° C
γ agua
20 ° C
=
h 20° C . ρmetanol 20 ° C
h20° C . ρagua
14 mm .
20° C
γ metanol 72.75
dinas cm
=
30 mm .
0.79150 g
ml 0.99829
ml
20 ° C
γ metanol=26.92 dinas / cm
Pa&a a&a e) e) ,e ,eta0) a0) a °C 30 ° C
γ
h
ρ
30 ° C
g
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T
r=
2 γ agua T
T
h . ρagua . g
Sa"e+0 +e ate,a0 3$e: 1 dina =1 g .
cm s
2
A 1°C
(
g.
)
cm 2
s 2 73.91 cm
r= 3.1 cmx
0.99977 g 3
cm
2
x 9.81 x 10
r = 0.0486 cm
A ;°C 2
r=
(
)
cm g. 2 s 72.75 cm
0.99829
cm 2 s
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r = 0.053 cm
A 5°C
(
g.
)
cm
s 2 68.10 cm
r= 2.5 cmx
0.98802 g 3
cm
2
2
x 9.81 x 10
cm 2 s
r = 0.056 cm
P0& )0 tat0 e) &a+"0 !e& e) %&0,e+"0 +e )0! &a+"0! 0te"+0! a +"!t"ta! te,%e&at$&a! ,e+"+a! %0& e) a$a. r prom=
r prom=
r
10 ° C
+r 20 ° C +r 30 ° C + r 40 ° C + r 50 ° C 5
0.0486 + 0.0495 + 0.050 + 0.053 + 0.056 5
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. DISCUS DISCUSION ION DE RESUL RESULT TADOS •
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1.. CO 1 CONC NCLLUS USIO IONE NES S •
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11. REC RECOME OMENDA NDACIO CIONES NES •
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1;.
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a!0("a+0 t"ee $ %$t0 +e e$))"("# 0&,a),ete e)e/a+0 %a&a $ (0,%$e!t0 +e !$ %e!0 ,0)e($)a& 4 ,0,et0 +"%0)a&. E) 6$0&$&0 +e -"+e0 -"+e0 %0& e7e,%)0 e7e,%)0 -"e&/e a $a te,%e&at$&a ,! a)ta 3$e
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La$& e! +e("& %$e+e +"!,"$"&!e e) &e3$e&","et0 +e ee&8a +e G"a! %a&a )a 20&,a("# +e e,$)!"#.
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1.
BIBLIOGRAFIA
]1 AtY"! _Te!"# S$%e&'("a) ` +e Fisicoquimica. Pa. ;;