A) How much energy would be required to melt 500 grams of ice at 0°C to water at 0°C?

Heat required = Q = 40 kcal

Given

mass of 500 g ice

Required

Heat required

Solution

The heat to change the phase can be formulated :  

Lf=latent heat of fusion  

Lv=latent heat of vaporization  

Lf for water = 334 kj/kg=6.01 kJ/mol = 80 cal/g

Phase change(ice to water)

Q=  500 g x 80 cal/g

Q = 40 kcal

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answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;