1. The problem statement, all variables and given/known data How much heat is needed to melt 16.7 kg of iron that is initially at 21.3°C? 2. Relevant equations Q=m*c*ΔT + mL 3. The attempt at a solution here: m=16.7kg, c=0.45kJ/kg*K, and ΔT=1538-21.3=1516.7 Thus, Q1=1.14e7 J Then, I need to calculate latent heat needed, which is Q2 = (2.67 x 10^5)* (16.7) = 0.44584 x 10^7 So, the total heat needed is: Q1+Q2=1.55x10^7 J. I also got 1.58x10^7 on my second try. But neither are the right answer. What did I do wrong?