sonam jain   sonam jain is offline sonam jain's messages in the community
  • 1
  • 2
  • GO
  • Go to Page...
Message
Catalogs Discussion Forums -> Organic Chemistry -> can anyone plz explain E1 & E2 reactions in detail with e.g.? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
can anyone plz explain E1 & E2 reactions in detail with e.g.?
Community shelf Community shelf -> How to study mathematics -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
it's awesome
Community shelf Community shelf -> Easy way of finding squares from 60 to 70 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
it's very lenthy & difficult to remember also
Community shelf Community shelf -> Want to master Organic???????READ IT -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
that all of us know,it's applicable in every field
Community shelf Community shelf -> Useful Shortcut(Chemistry) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
thanx
Community shelf Community shelf -> ###...How To Think About Reactions...### -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
very interesting
Community shelf Community shelf -> master complete organic chemistry... -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
very nice collection
Catalogs Discussion Forums -> Lounge -> sample papers, books for jee, bitsat, aiee -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
thanks.
my mail address is : sodium_jain@yahoo co in
Community shelf Community shelf -> I.I.T. J.E.E. mock test paper : physics -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
it's ok.it can be useful for someone else.
Community shelf Community shelf -> some points on thermodynamics. -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]

Some points to note

1. Isothermal Process
Pv=constant
VdP+PdV=0
-VdP/dV=P
Now Bulk Modulus= -VdP/dV
So Bi=P

Adiabatic Process
PVy=constant
VydP+PyVy-1dV=0
So Ba=yP

2. if A sold sphere and a hollow sphere having same material and size are heated to same temperature and allowed to cool in the same surrounding ,it has been found that hollow sphere cools faster than solid sphere

Questions for Thermodynamics

Question 1:A monoatomic gas of n moles is contained in a vertical, frictionless piston cylinder device at Temperature T. The piston has a mass of M kg with a cross-sectional area of A cm2 and the atmospheric pressure is P N/m2.
a,Determine the pressure inside.
b. what amount is heat required to raise the temperature by ?T and double the volume


Question 2:The pressure of the gas in constant volume gas thermometer are 80 cm,90cm and 100cm of mercury at the ice point,the steam point and in a heated wax bath resp.Find the temperature of the wax bath

Question 3.The heat capacity of a substance is found to be varies as temperature
C=C0(1+aT).
A sample of mass m of that substance is heated from tempertaure T1 to T2.How much heat is required

Question 4.A monotonic gas is taken through ABCDA cycle.
A->B Constant Pressure process
B->C Constant volume process
C->D Constant Pressure process
D->A Constant volume process

The PV coordinates of point A are (P,V)
The PV coordinates of point B are (P,3V)
The PV coordinates of point C are (3P,3V)
The PV coordinates of point D are (3P,V)

1 Find the total workdone in the cycle
2 find the efficiency of the cycle.

Question 5.The coefficent of linear expansion of a substance is found to be varies as temperature
?=?0(1+aT).
A rod of lenght L made of that substance is at tempertaure T1 .It is heated to temperature T2.What is the final length of rod
physics expert0 comments

Friday, January 25, 2008

IIT JEE Questions for Thermodynamics

Question 1:A gas is contained in a vertical, frictionless piston cylinder device. The piston has a mass of 20 kg with a cross-sectional area of 20 cm2 and is pulled with a force of 100N. If the atmospheric pressure is 100 kPa, determine the pressure inside.


Question 2:A piston-cylinder device has a ring to limit the expansion stroke. Initially the mass of air is 2 kg at 500 kPa, 30° C. Heat is now transferred until the piston touches the stop, at which point the volume is twice the original volume. More heat is transferred until the pressure inside also doubles. Determine the amount of heat transfer and the final temperature.


Question 3: A piston cylinder device contains 40 kg of water at 150 kPa, 30°C. The cross-sectional area of the piston is 0.1 m2. Heat is now added causing part of the water to evaporate. When the volume reaches 0.2 m3, the piston reaches a linear spring with a spring constant of 120 kN/m. More heat is added until the piston rises another 25 cm. Determine the final pressure, temperature and the energy transfers.


Question 4:Is the energy of the system U an intensive or extensive variable?



Question 5:Suppose we have M+N systems prepared, and the first is in thermal equilibrium with the second, the second in thermal equilibrium with the third, etc., until system M+N- 1 is in thermal equilibrium with the M+Nth system. Is the first system in thermal equilibrium with the M+Nth?


Question 6:A gas is contained in a cylinder with a moveable piston on which a heavy block is placed. Suppose the region outside the chamber is evacuated and the total mass of the block and the movable piston is 102 kg. When 2140 J of heat flows into the gas, the internal energy of the gas increases by 1580 J. What is the distance s through which the piston rises?


Question 7:A resistance thermometer is such that resistance varies with temperature as
RT=R0(1+aT+bT5)
where T represent Temperature on Celsius scale And a,b,R0 are constants.R0 unit is ohm
Based on above data ,Find out the unit of a,b
physics expert0 comments

Friday, January 18, 2008

Problem on Thermal Expansion

Question
A circular hole of diameter 2.00 cm is made in an aluminium plate at 0 ° C .what will be the diameter at 100° C?
? for aluminium = 2.3 * 10-3 / ° C
it's source.
Community shelf Community shelf -> Joint Entrance Examination (JEE) - The Run For All -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
thanks
Community shelf Community shelf -> Learn PHYSICS in detail -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
yes, second one is very useful.thanks
Community shelf Community shelf -> factors which affect reaction pathway in SN!1 n SN2 reacn -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
finally i saw it. yes it is useful
Catalogs Discussion Forums -> Lounge -> Congrats Nadeemoidu......ranked 5th in GMO..... -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
congratulations!!
Catalogs Catalogs -> Physics -> Concepts of Physics 1&2 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
lacks explanations.
should have an answer booklet as well
Images Images -> goiit_user_images -> -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Images Images -> goiit_user_images -> -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Images Images -> goiit_user_images -> -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Images Images -> goiit_user_images -> -> Go to message
This Post 2 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Images Images -> goiit_user_images -> -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
 
 
  • 1
  • 2
  • GO
  • Go to Page...
Go to: 
Free Sign Up!
Sponsored Ads

Preparing for JEE?

Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015


@ INR 5,443/-

For Quick Info

Name

Mobile

E-mail

City

Class