MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details
Get extra R 560 off
USE CODE: MOB20

				   

What is the amount of energy required to raise a liquid in a capillary tube?

7 years ago

Share

Answers : (1)

										












Energy required to raise a liquid in a capillary tube


 


When a capillary tube is dipped vertically into a liquid which wets the walls of the tube, there is rise of the liquid inside the tube. Due to the rise, the liquid, gains in potential energy. The question, therefore arises as to where does it get this increase in its potential energy from. The explanation is, however, simple.


 


We have three surface of separation to consider when a capillary tube is immersed in a liquid viz., (i) an air-liquid surface (ii) an air-glass surface and (iii) a glass-liquid surface each having its own surface tension, difference from the others, and equal to its free surface energy per unit area.


 


Now, as the plane liquid surface in the tube acquires a curvature, (i.e. become concave), the air-liquid surface increases and, as the liquid rises in the tube, the glass-liquid surface increases, the air-glass surface decreasing by an equal amount. Thus, the surface energy of the air-liquid and the

glass-liquid surface increases while that of the air-glass surface decreases by the same amount. In other words, the energy required to raise the liquid in the capillary tube is obtained from the surface energy of the air-glass surface.


 


On the other hand, a liquid, which does not wet the walls of the tube, get depressed inside it, below its level outside the tube. In this case, obviously the glass-liquid surface decreases, whereas the air-glass surface increases by an equal amount, resulting in a net increase in the surface energy of the whole system. This energy is derived form the depression of the liquid inside the tube, whose gravitational potential energy is thus decreased by an equal amount.

7 years ago

Post Your Answer

Other Related Questions on Thermal Physics

Explain in which cases Power will become Negative in Physics and also in Chemistry?
 
 
Dear student The question is not clear...can you please tell in which regard are you asking the poer to be negative?
  img
Bhavya 4 months ago
 
Energy is Negative of a system when that system is isolated from any other system and there is no any other +ve or -ve enery in or out the System to make it +ve.This energy is dangerous as...
 
Kuldeep Pal 4 months ago
 
@ ramya actually its just the magnitude of work done in unit time . and REMEMBER 1 THING – POWER CANNOT BE -VE . its actually a modulus , so, power can never be -ve . HOPE IT CLEARS YOUR...
 
Umakant biswal 4 months ago
liquid in a metallic pot boils quickly whose base is made black and rough than in a pot whose base is highly polished?
 
 
@shubham a black body is good absorber of heat and light, and the black body will not release the heat energy gained easily. and a rough body will have more surface area as compared to a...
 
RUSHABH 2 months ago
 
Its reason is being black its a good absorber and hence its will boil better. and if they are rough surfaces then also it will be work as a good absorbed and polished surface donot have that...
 
Umakant biswal 2 months ago
 
A block body is good absorber of heat and light,and the black body will not release the heat energy gained easilyand rough body will have more surface area as compared to a polished body.
 
Ganesh Gana one month ago
Is cengage is Best Books for JEE preparation ? what are best books for doing problems?
 
 
@ vemulath yes , cengage are best choice for maths , but for other subject , donot foloow that . i am giving some recommendation for jee books below chemistry 1- physical by p . bahadur 2-...
 
Umakant biswal 5 months ago
 
Cengage contains good quality questions but the solutions they give in solved examples are not up to the mark,. for physics its good but lacks in chemistry.
 
shivesh singh 5 months ago
what is work energy thereom...................................?
 
 
The work-energy theorem is a generalized description of motion which states that work done by the sum of all forces acting on an object is equal to change in that object’s kinetic energy....
 
dolly bhatia one month ago
 
The work W done by the net force on a particle equals the change in the particle`s kinetic energy KE: W = Δ K E = 1 2 m v f 2 − 1 2 m v i 2 . The work-energy theorem can be derived from...
 
Sushmit Trivedi one month ago
 
For any net force acting on a particle moving along any curvilinear path, it can be demonstrated that its work equals the change in the kinetic energy of the particle by a simple derivation...
 
rahul kushwaha 3 months ago
The cieling of long hall is 25 m high What is the maximum horizontal distance that a ball thrown with a speed of 40 ms can go without hitting the ceiling of wall? Plz explain with a DIAGRAM
 
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 40*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 30*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Diagram is not required to solve this question. You can directly use the formula to find range : R = (v^2/g)*sin2Q Maximum height reached, H = v^2*sin^2Q/2g So, 25 = 40^2*sin^2Q/(2*9.8) So,...
 
Tapas Khanda 5 months ago
What harmfull gases are produced when we burn plastics? And can we burn plastics?
 
 
I`m doing a project, can someone help me, How to reduce those toxic contents when plantic are burnt Like sulphur, nitrogen etc
 
2017 years ago
 
nitrogen gas , sulphur dioxide ,carbon monoxide , carbon dioxide. are some of the gases. well burning plastic is not good for living things. but there are many other things that are more...
 
3 days ago
View all Questions »

  • Complete Physics Course - Class 12
  • OFFERED PRICE: R 2,600
  • View Details
Get extra R 520 off
USE CODE: MOB20

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details

Get extra R 560 off
USE CODE: MOB20

More Questions On Thermal Physics

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details