- #1
Anony-mouse
- 60
- 0
Homework Statement
How much heat is needed to melt 16.7 kg of iron that is initially at 21.3°C?
Homework Equations
Q=m*c*ΔT + mL
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?