Chloroflurocarbons (cfcs) are no longer used as refrigerants because they destroy the ozone layer. trichlorofluoromethane (ccl3f) boils are 23.8c and its molar heat of vaporization is 24.8 kj/mol. calculate the molar entropy of evaporation of cc3f (l)

83.60 J/k mol

Explanation:

The molar entropy of vaporization,ΔS vap   is given by the expression:

ΔS vap = ΔHvap / Tb  where

ΔHvap = molar enthalpy change of vaporization, J/mol

Tb = boiling temperature, K

We have both  ΔHvap, and Tb so lets solve our question.

T= (23.8 + 273) = 296.8 K

ΔHvap = 24.8 kJ = 24.8 x 10³ J

ΔS vap = ΔHvap / Tb = 24.8 x 10³ J/mol / 296.8 K = 83.6 J/k mol

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )