Dadas las siguientes ecuaciones y valores de ∆H° determine el calor de reacción (kJ) a 298 K para la reacción: 3 Fe2O3 (s) → 2 Fe3O4 (s) + 1/2 O2 (g)

Si:

2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s) ∆H°= -823,41 kJ

3 Fe (s) + 2 O2 (g) → Fe3O4 (s) ∆H°= -1120,48 kJ

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

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 .