Consider the following generic reaction: A+2B→C+3D with ΔH = 111 kJ . Determine the value of ΔH for each of the following related reactions. a. 3A+6B->3C+9D b. C+3D->A+2B c. 1/2C+3/2D->1/2A+B

Consider the reaction.   2Fe2O3⟶4Fe+3O2Δ?∘rxn=+824.2 kJ2Fe2O3⟶4Fe+3O2ΔHrxn°=+824.2 kJ   The formation of 75.0 g75.0 g of O2 results in the absorption of 1930 kJ1930 kJ of heat. the absorption of 20600 kJ20600 kJ of heat. the release of 20600 kJ20600 kJ of heat. the release of 644 kJ644 kJ of heat. the release of 1930 kJ1930 kJ of heat. the absorption of 644 kJ644 kJ of heat.

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Calcium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) Ca (s) 0 0 41.4 Ca (g) 178.2 144.3 158.9 Ca2+ (g) 1925.9     CaC2 (s) -59.8 -64.9 70.0 CaCO3 (s, calcite) -1206.9 -1128.8 92.9 CaCl2 (s) -795.8 -748.1 104.6 CaF2 (s) -1219.6 -1167.3 68.9 CaH2 (s) -186.2 -147.2 42.0 CaO (s) -635.1 -604.0 39.8 CaS (s) -482.4 -477.4 56.5 Ca(OH)2 (s) -986.1 -898.5 83.4 Ca(OH)2 (aq) -1002.8 -868.1 -74.5 Ca3(PO4)2 (s) -4126.0 -3890.0 241.0 CaSO4 (s) -1434.1 -1321.8 106.7 CaSiO3 (s) -1630.0 -1550.0 84.0       Carbon ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) C (s, graphite) 0 0 5.7 C (s, diamond) 1.9 2.9 2.4 C (g) 716.7 671.3 158.1 CCl4 (l) -135.4 -65.2 216.4 CCl4 (g) -102.9 -60.6 309.9 CHCl3 (l) -134.5 -73.7 201.7 CHCl3 (g) -103.1 -70.3 295.7 CH4 (g) -74.8 -50.7 186.3 CH3OH (g)…

9.An _____ reaction results when the energy released by the formation of products is greater than the energy required to break the bonds in the reactants. Group of answer choices A, endothermic B, exothermic C, exergonic   10,The following is correct for the chemical reaction taking place at constant volume: Group of answer choices A, ΔE = 0 B, ΔH = ΔE + P ΔV C, ΔE = q D, ΔE = ΔH

Find ΔHrxnΔHrxn for the reaction: C(s)+2H2(g)→CH4(g)C(s)+2H2(g)→CH4(g) Use these reactions with known ΔHΔH's: CH4(g)+2O2(g)C(s)+O2(g) 2H2(g)+O2(g)→→→ CO2(g)+2H2O(g)CO2(g) 2H2O(g)ΔH=−892kJΔH=−393.6kJΔH=−483.6kJ

Nitrogen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) N2 (g) 0 0 191.6 N (g) 472.7 455.6 153.3 NH3 (g) -46.1 -16.5 192.5 NH3 (aq) -80.0 -27.0 111.0 NH4+ (aq) -132.0 -79.0 113.0 NO (g) 90.3 86.6 210.8 NOCl (g) 51.7 66.1 261.8 NO2 (g) 33.2 51.3 240.1 N2O (g) 82.1 104.2 219.9 N2O4 (g) 9.2 97.9 304.3 N2O4 (l) -20.0 97.0 209.0 N2O5 (s) -42.0 134.0 178.0 N2H4 (l) 50.6 149.3 121.2 N2H3CH3 (l) 54.0 180.0 166.0 HNO3 (aq) -207.4 -111.3 146.4 HNO3 (l) -174.1 -80.7 155.6 HNO3 (g) -135.1 -74.7 266.4 NH4ClO4 (s) -295.0 -89.0 186.0 NH4Cl (s) -314.4 -202.9 94.6 NH4Cl (aq) -299.7 -210.5 169.9 NH4NO3 (s) -365.6 -183.9 151.1 NH4NO3 (aq) -339.9 -190.6 259.8     Oxygen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) O2 (g) 0 0 205.1 O (g) 249.2 231.7 161.1 O3 (g)…

If a given reaction is A + B --> 2C with ΔH = 123.4 kJ and the needed reaction is 2A + 2B --> 4C, what is the ΔH for the needed reaction?