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If latent heat of fusion of ice is 80 ca...

If latent heat of fusion of ice is 80 cals per g at `0^(@),` calculate molal depression constant for water.

A

18.36

B

186.3

C

1.863

D

0.1863

Text Solution

Verified by Experts

The correct Answer is:
C
`"K"_("f")=("RT"_("f")^(2))/(1000l_("f"))" Here R"=2"cals","T"_("f")=0+273=273"K, "l_("f")=80"cals"`
`"K"_("f")=(2xx273xx273)/(1000xx80)=1.863`
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