Use the standard reaction enthalpies given below to determine AH xn for the following reaction 4 SO3(g) 4 S(s) + 6 O₂(g) AH' xn= ? Given: SO₂(g) → S(s) + O₂(g) AH'n +296.8 kJ 2 SO₂(g) + O₂(g)-2 SO3(9) AH = -197.8 kJ In O 494.6 kJ O-791.4 kJ O 692 4 KJ O 293.0 kJ O 1583 kJ

Use Hess's Law to calculate the enthalpy for this reaction: 4SO3(g) → 4S(s) + 602(g) AH° ??? kJ !! rxn Given the following thermochemical equations: SO2(g)→ S(s) + O2{g) AH° = +296.8 kJ 2SO2(g) + O2(g) → 2SO3(g) AH° = -197.8 kJ

Consider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ ((b) Calculate the amount of heat transferred when 40.0 g of CH3OH(g) are decomposed by this reaction at constant pressure.H =  kJ(c) If the enthalpy change is 20.0 kJ, how many grams of hydrogen gas are produced? g(d) How many kilojoules of heat are released when 12.5 g of CO(g) reacts completely with H2(g) to form CH3OH(g) at constant pressure?H =   kJ(e) Calculate E when 880.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K   kJ HopHelpCh5N1

For which one of the following is the enthalpy of the reaction the same as the enthalpy of formation? A) 2 H (g) + Se (s) → H:Se (g) B) KOH (s) → K*(aq) + OH- (aq) C) 2 Fe (s) + 3 Cl2 (g) → 2 FeCl3 (s) D) Ni (s) + ½ O2 (g)- NiO (s)