why as atmospheric pressure increases,boiling point also
increases?

Answers were Sorted based on User's Feedback



why as atmospheric pressure increases,boiling point also increases?..

Answer / balachandran

before answering that I have let me introduce one technical word' vapour pressure'.It is the pressure exerted by the vapour of the concerned substance with that substance at equilibrium.Usually boiling point is determined by prominancy b/w vapour pressure and atmospheric pressure.Suppose water is boiling in an open vessel,let atm prssur be 1 bar.At 1 bar ,boiling point is 100C.suppose this is boiled at a higher altitude,say 1km above sea level.atm presure reduced to .8 bar.but the vapour pressure is still constant for that liquid.Vapour pressure can oppose lower atms pressure easily than a higher atms pressure sothat vapours can easily come out out of the lid.Thus ,a liquids boling point reduces at lower atmospheric pressure.Any confusion still existing ,then mail me to bala300587@gmail.com

Is This Answer Correct ?    27 Yes 4 No

why as atmospheric pressure increases,boiling point also increases?..

Answer / rakesh jaiswal

boiling occurs when vapour pressure is equal to the
atmospheric pressure means when they r in equilibrium, if
atmospherice pressure is more we need to have vapour
pressure that means molecules need more energy to overcome
the cohesive intermolecular force.

Is This Answer Correct ?    6 Yes 1 No

why as atmospheric pressure increases,boiling point also increases?..

Answer / manojsiva v

The boiling point of an element or a substance is the temperature at which the vapour pressure of the liquid equals the environmental pressure surrounding the liquid.At higher surrounding atmospheric pressure,more amount of water(suppose) has to be converted into vapour state inorder to get eqalized with the surrounding environmental pressure.So to enable more amount of vapour formation means more amount of temperature required.Hence as atmospheric pressure increases,vapour pressure requirement increases and high temperature of liquid.thus higher boiling point.

Is This Answer Correct ?    5 Yes 1 No

why as atmospheric pressure increases,boiling point also increases?..

Answer / anil

saturation temp.(B.P.) and pressure(Atm.pressure) are
directly proportinal to each other and so B.P increases as
atm.pre increases

Is This Answer Correct ?    1 Yes 1 No

why as atmospheric pressure increases,boiling point also increases?..

Answer / manish dutta

so to know the ans of this , first we need to know the definition of boiling point ..
boiling point is the temp. at which vapour pressure of liquid equals the atmospheric pressure .. so if atm press increases then vapour pressure also increase . and to increase the vapour pressure of liquid we need to increase the temp .

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Mechanical Engineering Interview Questions

what is milling and types of milling?what is drilling and types of drilling? what is tapering and their types?

0 Answers   IOCL, TVS,


What are the protections required to protect turbine?

4 Answers   NTPC,


what is the pattern of written test for the post of trainee mechanical engg.

0 Answers   IOCL,


Which pipe is better, ERW or Seamless, when we talk of impact force upto 2700N ?

2 Answers  


when eating ice cream, why the spoon of wooden material is always straight & plastic spoon is always convex in shape?

5 Answers  






Function of vaccum breaker in Condesor of STG ,and what is the interlocks for opening it.

1 Answers   Ambuja,


What would be the COP of a chiller having capacity of 750 TR and IKW is 0.6 KW/TR

2 Answers  


why screw pumps are used instead of centifugal pump?

8 Answers  


NOW IAM WORKING QUALITY ENGG ONSHORE ...HOW CAN I CHANGE MY WORK INTO OFFSHORE ? NEED ANY QUALIFICATION ? PLEASE EXPALIN TO ME .....

0 Answers  


sir/ madam i m apearing to rrb bhubaneswar for entrans exam please i want a help to get thruogh this

0 Answers   RRB,


How many volts required to fire spark plug.

19 Answers  


On what property u can distinguish material as brittle or ductile?

10 Answers   DRDO,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)