Glacier National Park in Montana is approximately 4,100 ft above sea level with an atmospheric pressure of 681 torr. At what temperature does water (ΔHvap= 40.7 kJ/mol) boil at Glacier National Park?

Answer : The temperature of liquid is, 369.9 K

Explanation :

The Clausius- Clapeyron equation is :

where,

= vapor pressure of liquid at 373 K = 681 torr

= vapor pressure of liquid at normal boiling point = 760 torr

= temperature of liquid = ?

= normal boiling point of liquid = 373 K

= heat of vaporization = 40.7 kJ/mole = 40700 J/mole

R = universal constant = 8.314 J/K.mole

Now put all the given values in the above formula, we get:

Hence, the temperature of liquid is, 369.9 K