thermo doubt
in phase change, temp, pressure is constant...so wont delta h = ncpdt = 0 as dt = 0 and delta s = q /t = delta h /t which will again be zero
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@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.DH is defined as q at contant p
Q is not zero.
Similarly ds is defined as q rev/T
There again, q rev is non zero
and q is ncpdt at constant pressure
but dt should be 0 since temp remains constant
na that is not true. i can add heat at const p
which is exactly what is happening here :D
without increasing the temp
all the energy goes into changing the potential energy (solid bonds - liquid bonds)
physical process but yea
oh so that relation isnt applicable for this case since instead of increasing temp, that heat is changing potential energy?
Yes
Technically
It is doing work
Not changing potential energy
oh yeah and that gets cancelled by +pdv in delta h eqn right
Isiliye isko latent heat bolte hai.
It doesn’t change t.
11.3 Phase Change and Latent Heat - Physics | OpenStax
So far, we have learned that adding thermal energy by heat increases the temperature of a substance. But surprisingly, there are situations where adding...
Usually in physics though
accha okk thanks
i would've got crazy over it 😅
+fsolved
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