question_answer

2 kg of ice at \[-20{}^\circ C\] is mixed with 5kg of water at \[20{}^\circ C\] in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water & ice are\[1k cal/kg/{}^\circ C\] & \[0.5 kcal/kg/{}^\circ C\]while the latent heat effusion of ice is 80 kcal/kg

A) 7 kg

B) 6 kg 

C) 4 kg

D) 2 kg