In: Chemistry
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars every day. Although the actual process also requires water, a simplified equation (with rust shown as Fe2O3) is: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) ΔHrxn = −1.65 × 103 kJ (a) What is the ΔHrxn when 0.250 kg of iron rusts? × 10 kJ (b) How much rust forms when 2.60 × 103 kJ of heat is released? × 10 g Fe2O3