[单选题]
How much heat energy ilh)z*xgrwj bbc6 u; 8;s nj jyal6 4ype 5+t zn1f2qzz+0qeeded to change 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. $2.5 \times 10^{7} \; J$
