Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the ancient romans as mortar in stone structures. the reaction for this process is

ca(oh)2(s) + co2(g) --> caco3(s) + h2o(g) ; δh = -69.1 kj

what is the enthalpy change if 3.8 mol of calcium carbonate is formed?

(a) -18 kj
(b) -69 kj
(c) -73 kj
(d) -260 kj