9u r assuming isothermal expansion instead of adb exp
Guys a big Conceptual Doubt.
Have A look.
Surface energy is the work done per unit area in the surface against force of surface of tension at constant temp.
and surface energy is numerically taken equal to surface tension.
But here is a contradiction that at constant temp, if a surface is expanded then some heat is also absorbed (isothermal expansion), and this energy should also constitute surface energy.
Now guys I want ur views on this, Am I correct or not?
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11 Answers
11watever it may be.
but if any problem comes should we take this factor into account.....
11OK.
But in problems of surface energy, do we have to keep this thing in mind..
106if u consider isothermal expansion, then extra heat will be needed to be provided which is given by the relation
E=T+H where,
E= surface energy
T=surface tension
H=heat per unit area
11I think the heat absorbed is negligible or too small to be considered.
Thats why surface energy is numerically taken to be equal to the surface tension........
11@celestine.....
Dude i've checked it is not adiabatic expansion, it is isothermal expansion.....
1wel i think............this is given when it is not expanded........... i mean to say is tht..........surface energy and surface tension are equal at static times..............tht means when nothing is done they r equal............................................tht is when they are not expanded they are equal...... and when they r exapanded they are not taken into account..........I THINK