[单选题]
How much heat energy is needyq n1aos q;2z:mk8nx4 fqyw) -ed to chactc(k.u7bqtvtrt kuq :44sy/(a: 7 qvnge 10 kg of water at $50 \; ^{\circ}C$ to steam at $120 \; ^{\circ}C$?
A. $4.2 \times 10^{5} \; J$
B. $2.3 \times 10^{7} \; J$
C. $4.2 \times 10^{6} \; J$
D. $2.5 \times 10^{7} \; J$
