[单选题]
An ice cube of mass
wf7 kb5e*3v bf5edf/l ,9w hwvm at
23wc:wy k y)d u3ja:0u 9etf)jhcuc .cits melting temperature is placed in a mass M of water at an initial temperature of
: :yuhc3jftwuwj) c9 c)ea3.k2uy dc0$20^{\circ}C$. Assume that the specific heat capacity of liquid water is $4\,kJ\,kg\,K^{−1}$ and it has a specific latent heat of fusion of $320\,Jg^p{−1}$.
Assuming that the system is thermally isolated , what is the minimum value of M required for the ice to completely melt?
