How much energy does it take to freeze 30.0g of H2O at 0 oC?

Energy to freeze : 10020 J

Given

mass of H₂O = 30 g

Required

Energy to freeze

Solution

Reaction

H₂O(l) ⇒  H₂O(s)

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Lf = latent heat of fusion (for water/ice = 334 J/g)

Then heat to freeze :

answer

the ions in solute supperate from eachouthere

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