The decomposition reaction of carbon disulfide, CS2, to carbon monosulfide, CS, and sulfur is first order with k = 4.89x10-7
S-1 at 800.C.
CS2 - CS + S
How many days would pass before a 5.00 g sample of CS2 had decomposed to the extent
that 0.45 g of CS2 remains?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .