How much heat (in kilojoules) is involved in the oxidation of 105.4 g of Fe at 25°C? 4 Fe(s) + 3 O 2(g)↔ 2 Fe 2O 3(l) --> ΔH = -1648 kJ

1. Is heat considered a product or a reactant of the reaction?2. Is the formation of FeSCN+2 an endothermic or exothermic reaction?

Consider the reaction: 4A + B= 2C.        Δ H=-443.6Kj/mol what reaction corresponds to a H of Δ221.8 Kj/mol

Iron can be extracted from the iron(III) oxide found in iron ores (such as haematite) via an oxidation-reduction reaction with carbon. The thermochemical equation for this process is: 2 Fe203(s) + 3 C(s) → 4 Fe(1) + 3 CO2(g) AH° = +467.9 kJ

The flame in a torch used to cut metal is produced by burning acetylene (C2H2)(26.04 g/mol) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251 kJ of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 22.5  × 104 kJ of heat?                                            2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g) ΔH = –2502 kJ

For the reaction: 2 CH3OH) +3 02(g) (1) → 2 CO2 + 4 H20u) + 4 H200 + 347 kcal Calculate the amount of heat in kcal & kJ released when 25.4 g of CH,OH reacts.

*ONLY THE SECOND PART*

Calculate the enthalpy of decomposing hydrogen iodide to produce hydrogen and iodine.                                          2HI(g) →  I2(s) + H2(g)   I2(s) → I2(g)                                  ΔH⁰ = 124.8 kJ/mol I2(g) + H2(g) → 2HI(g)                          ΔH⁰ = - 73.0 kJ/mol

Consider the reaction: 8 H2O (l) + 4CO2 (g)→4  CH3OH (l) + 6 O2 (g) ΔH = +2905.6 kJ What is ΔH for the following reaction? 2 CH3OH (l) + 3 O2 (g) →4 H2O (l) + 2 CO2 (g)