Question

Fiona is thirsty but she finds the pint of water in a glass too warm, Twater0 = 23 oC. At least how much ice does she have to put into the drink to cool it down to 18 oC? Give your answer in grams with three significant figures, without typing the unit, ‘g’. The initial temperature of the ice is Tice0 = –5 oC; The latent heat of fusion of ice is Lf = 333.55 J/g; Specific heat of ice is cice = 2.1 kJ kg–1 oC–1; Specific heat of water is cice = 4.2 kJ kg–1 oC–1; Water density is ρwater = 1 g/cm3; Take a pint as Vwater = 0.5 dm3.