MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistrySolutionsDepression in freezing point

Given that Tf is the depression in freezing point of the solvent in a solution of a nonvolatile solute of molality 1, the quantity f m T lt m → is equal to

A.Lf (latent heat of fusion)

B.Kb (ebullioscopic constant)

C.Kf (cryoscopic constant)✓ Correct

D.Hfus (enthalpy of fusion)

Explanation

The molar freezing point depression constant is the depression in freezing point for 1 molal solution f f T k m x When 1, f f m T k Thus, when fT is the depression in freezing point of the solvent in a solution of a non-volatile solute of molality m, the quantity 1 lim → f m T m is equal to molal depression constant. SOLUTIONS 44

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