You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 60.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 760 g and an initial temperature of 20.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the flask, or to the environment.)

Respuesta :

Answer:[tex]T=12.69^{\circ}C[/tex]

Explanation:

Given

Mass of ice [tex]m=60 gm[/tex]

mass of water [tex]M=760 gm[/tex]

Initial Temperature of water [tex]T_i=20^{\circ}C[/tex]

Let T be the Final Temperature of mixture

Latent heat of Fusion [tex]L=334 J/gm[/tex]

heat required to melt ice completely is

[tex]Q_1=60\times 334=20.04 kJ[/tex]

Heat released by water is taken by ice thus

[tex]Mc_{water}(20-T)=mL+mc_{water}(T-0)[/tex]

[tex]0.76\times 4.184\cdot (20-T)=20.04+0.06\times 4.184\cdot (T)[/tex]

[tex]T=12.69^{\circ}C[/tex]