Iron -Q lost -[m ∙ C p ∙ ∆T] = -[(2) ∙ C p ∙ (-187)] = Water Q gained [m ∙ C p ∙ ∆T] [(2) ∙ (4.18) ∙ (20)] Ch12 HW#2 7-10 #7) (Mod) A 2.0 kg sample of iron at an initial temperature of 500K is dropped into a bucket containing 2.0 kg of water at an initial temperature of 293K.