posted by mark .
how much E is used to heat 500g of iron from 22c to 55c? Cfe=0.451 Jg-1C-1.
What's fe. You can't get too lazy in chemistry to punch the caps key. fe and Fe aren't the same. CO and Co and co are completely different.
q = mass metal x specific heat metal x (Tfinal-Tinitial).