1a
b
Vapor pressure of most substances increases with temperature
Which way of plotting these data is expected to give a straight line?
a) 1/P v/s T
b) P v/s 1/T
c) ln P v/s T
d) ln P v/s 1/T
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3 Answers
106Vapour pressure is basically arises due to equilibrium of the liquid phases and gaseous phases.
And from Van't Hoff eqn,
logK is inversely proportional to temp (also derivable from Arrhenius eqn)
K = Ae-E/RT
So logK = logA - E/RT
So the graph of logK and 1/T is a straight line.
Here K=eqbm const or rate const.
and partial pressure P is like the eqbm const of
H2O(l) -><- H2O(g)