試題詳解

 7. If 10 kg of ice at 0 oC is mixed with 100 kg of water at 80 oC and is additionally heated with 4620 kJ, what is the final temperature of the water? (The heat capacity constant of water is 4.2 kJ∙kg^-1 ∙K ^-1 , and the latent heat of fusion of water is 333 kJ∙kg^-1 .)
(A) 45 oC
(B) 55 oC
(C) 65 oC
(D) 70 oC
(E) 75 oC