In: Physics
Example 1: H2O boils at 100ºC and 1 atm. At what temperature will water boil
if pressure = 500 torr (1 atm / 760 torr) = 0.658 atm?
DvapH = 40.66 kJ mol-1.
Can you please show all steps and equations??? Thank you
In this question we ask to find the boiling temperature of water at given pressure which is 0.658 atm using given data.After reading question we can analyze the situation which says that this problem is based on phase transition.Phase transition problem can be solved using clapeyro-clausius equation which is as below.
where
is latent heat of
vaporization
since
we can say that
so Boiling temperature will Increase as pressure increase and vice
versa.
Our problem suggest that pressure is decreasing in 2nd case so
boiling temperature also decrease.