How much of a change in freezing point would the oceanexperience if the glaciers and icebergs melted? Here is what i haveso far:
If all of the glaciers and ice caps on earth melted, 24,064,000cubic kilometers of fresh water would become mixed in with theocean’s 1,338,000,000 cubic kilometers of saline water.
24,064,000 km^3 + 1,338,000,000 km^3 = 1,362,064,000 km^3
Currently, the ocean’s salinity is 3.5%(http://water.usgs.gov/edu/whyoceansalty.html). The ocean’ssalinity would decrease to 3.4% if all of the glaciers and ice capswere to melt.
1,338,000,000 km^3 saline water x .035 = 46,830,000 km^3salt
46,830,000 km^3 salt / 1,362,064,000 cm^3 = .034 0.034 x 100 =3.4%
Currently the freezing point of the ocean’s surface is -1.8degrees Celsius (28.8 degrees Fahrenheit)(http://nsidc.org/cryosphere/seaice/index.html).
I know it's a freezing point depression question and i use
Delta Tf = m x Kf
Kf of water is 1.86 C/m
But I can't figure out how to get 46,830,000 km^3 salt intomolality (moles/kg solvent)
Thanks!!
