LE 203  Termometria.
Autor: Professor Marcos Faria dos Santos | Publicado: 2017-03-03T12:33:00-08:00

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LE 203&nbsp;
Termometria.




Exercícios de Fixação:


1) &nbsp;Um termômetro indica 20oC.
Qual é essa temperatura na escalas Fahrenheit&nbsp; e 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Kelvin?

2)&nbsp;&nbsp; A
temperatura de um gás é de 127oC que na escala&nbsp; absoluta,
corresponde a:

3)&nbsp; Dois termômetros, um graduado na escala Celsius
e outro na escala Fahrenheit,&nbsp; 

&nbsp;&nbsp;&nbsp;&nbsp; fornecem a mesma leitura de um
gás. Determine o valor dessa temperatura.

4) Um termômetro de mercúrio é calibrado de forma que o
ponto de gelo corresponda a 

&nbsp;&nbsp;&nbsp; 5 cm de altura
da coluna de mercúrio e o ponto de vapor, a 10 cm de altura. Então:

&nbsp;&nbsp;&nbsp;&nbsp; a) Obtenha a
função termométrica que relaciona a temperatura C ( em oC) c/ altura
H 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ( em cm )

&nbsp;&nbsp;&nbsp;&nbsp; b) determine a temperatura na
qual a altura da coluna é de 7,7 cm.

5)&nbsp;&nbsp; Um
termômetro Kelvin e um termômetro Celsius foram introduzidos em um banho 

&nbsp;&nbsp;&nbsp;&nbsp; de óleo.
Verificou - se&nbsp; que as leituras apresentadas pelos termômetros estavam a 

&nbsp;&nbsp;&nbsp;&nbsp; razão 3/2 .
Qual a temperatura do banho de óleo, na escala Celsius? Res.: 546o&nbsp;
C

6) &nbsp; Para ser
graduado, um termômetro de mercúrio foi colocado em contato com gelo &nbsp;

&nbsp;&nbsp;&nbsp;&nbsp; fundente e
posteriormente com água&nbsp; em ebulição, ambos a 1 atm. Em contato com o 

&nbsp;&nbsp;&nbsp;&nbsp; gelo fundente
a coluna de mercúrio apresentou uma altura de 6 cm, e em contato 

&nbsp;&nbsp;&nbsp;&nbsp; com a água em
ebulição 26 cm. Em um ambiente cuja a temperatura é de 25oC, o 

&nbsp;&nbsp;&nbsp;&nbsp; valor da
coluna de mercúrio deste termômetro é de:


Questões de vestibulares:




1) &nbsp;( Unimep - SP) Numa das regiões mais
frias do mundo, o termômetro indica - 76oF. &nbsp;

&nbsp;&nbsp;&nbsp;&nbsp; Qual será o
valor dessa temperatura na escala Celsius?

2) &nbsp;( Vunesp - SP) Sêmen bovino para
inseminação artificial é conservado em nitrogênio 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; líquido que,
a pressão normal tem temperatura de 78 K. Calcule essa temperatura 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; em:&nbsp; a)&nbsp; graus
Celsius;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) graus
Fahrenheit

3)&nbsp; ( Osec - SP
) Uma temperatura na escala Fahrenheit é expressa por um número que é 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; o triplo do
correspondente na escala Celsius. Determine essa temperatura&nbsp;&nbsp; em oF?

4) ( Mack - SP) A indicação de uma temperatura na escala
Fahrenheit excede em 2 

&nbsp;&nbsp;&nbsp;&nbsp; unidades o
dobro da correspondente indicação na escala Celsius. Essa temperatura é:

5) ( UFGO) Quando um corpo está numa&nbsp; temperatura
que em graus Celsius tem a 

&nbsp;&nbsp;&nbsp;&nbsp; metade do
valor medido em graus Fahrenheit, pode-se afirmar que sua temperatura é: 

6)&nbsp; ( Belas
Artes - SP ) Numa escala termométrica X, a temperatura do gelo fundente 

&nbsp;&nbsp;&nbsp;&nbsp; corresponde a
- 80oX e da água em ebulição, a 120oX.&nbsp; Qual a
temperatura absoluta 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; que
corresponde a 0oX?

7) &nbsp;( UFBA ) Dois termômetros, Z e W,
marcam, nos pontos de fusão do gelo e de 

&nbsp;&nbsp;&nbsp;&nbsp; ebulição da
água, os seguintes valores:&nbsp; As escalas apresentam a mesma leitura a:



 

  
Termômetro

  
Fusão do gelo

  
Ebulição da água

 

  
Z

  
4,0

  
28,0

 

  
W

  
2,0

  
66,0

 


8) &nbsp;(UFCE) O planeta mercúrio e o que sofre
a maior variação de temperatura no 

&nbsp;&nbsp;&nbsp;&nbsp; sistema solar
.&nbsp; A&nbsp; temperatura da parte iluminada chega a 400oC,
enquanto o lado 

&nbsp;&nbsp;&nbsp;&nbsp; escuro,
cai&nbsp; a -200oC. Essa variação de temperatura escrita em Kevin,
é: