When iron is exposed to moisture and it rusts; the value of ΔG for the reaction is? by Sunday | Oct 14 | Chemistry JAMB | 0 comments A. neutral B. zero C. positive D. negative Correct Answer: Option D – negative Users Also Read These:What quantity of electrons (in mole) is lost when…The type of iron that is best suited for welding;…What quantity of electrons is lost when one mole of…When iron is exposed to moist air; it gradually…A piece of iron weighs 250N in air and 200N in a…