Ten Kilograms of Water at 0 $\degree$ C Is Mixed with 10 Kg of Water at 100

Multiple Choice

Ten kilograms of water at 0 $\degree$ C is mixed with 10 kg of water at 100 $\degree$ C.The change in entropy (in cal/K) of the system is

A) 1 000
B) 480
C) -720
D) 240
E) -168