Answer to Question #182115 in General Chemistry for Lauren Barad

Question

How many grams of water can be frozen at 0^oC with the removal of -129.8 J? (Specific Heat = 4.2 𝐽/𝑔^o𝐶, Enthalpy of fusion 6010 J/mol, Enthalpy of vaporization = 40700 J/mol)

Answer 1

Number of moles frogen

=

6010 / 129.8

= 46.3 mol .

Mass of H₂O = ( 46.3 × 18 ) g =

832 . 1538