At 25 oc, the vapor pressure of water is 23.8 torr and the heat of vaporization is 43.9 kj/mol. calculate the vapor pressure of water at 50. oc

The vapor pressure of water at is 93.8 torr

Explanation:

The vapor pressure is determined by Clausius Clapeyron equation:

where,

= initial pressure at = 23.8 torr

= final pressure at = ?

= enthalpy of vaporisation = 43.9 kJ/mol = 43900 J/mol

R = gas constant = 8.314 J/mole.K

= initial temperature =

= final temperature =

Now put all the given values in this formula, we get

Therefore, the vapor pressure of water at is 93.8 torr

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.