2. The following reaction is by the reaction. 4A1 (s) + 302 (g) a) exothermic, released → 2A1203 (s) b) exothermic, absorbed c) endothermic, released d) endothermic, absorbed , and therefore heat is AH° = -3351 kJ

2. Which chemical reaction below yields the heat of formation of gaseous carbon monoxide (CO)? (A) C(g) + O(g) → CO(1) (B) C(g) + 1/2O2(g) →CO2(g) (C) C(s) + 1/2O₂(g) →CO(g) (D) 2C(s) + O₂(g) →→2CO(g) (E) 1/2C₂(g) + 1/2O2(g) →CO(g)

How many moles of H2 are required to produce -2501 KJ of heat in the following reaction?       Heat of Formation = -91.8 KJ/mol    N2(g) + 3 H2(g) --> 2NH3(g)

8CO2(g) + S13N4(s) → 8CO + 2N20 + 3SIO2 AH = +461.05 kJ a) Is this reaction exothermic or endothermic? b) What type of reaction is this? c) Is heat a reactant or product in this reaction? d) How much heat energy is produced when 5.5 g of carbon dioxide are reacted? e) What mass of N20 is produced when 3.5 g of S13N4 are reacted? f) How much heat energy is involved when 7.5 g of Si02 are produced?

Consider the reaction.   2Fe2O3⟶4Fe+3O2.    Δ?∘rxn=+824.2 kJ   The formation of 12.0 g of O2 results in the release or absorption of what amount of heat? in kJ

Which of the following represents an endothermic reaction? CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) + 890 kJ 2C2H6 (g) + 702 (g) → 4CO2 (g) + 6H20(g) + 3120 kJ 2SO2 (g) → 25 (s) + 202 (g) + 376KJ 2H20 (g) + 572 kJ → 2H2 (g) + O2 (g)

If 106 kJ of heat are evolved when the reaction described below is carried out, the mass of HCI gas (36.46 g/mol) produced is 3 Cl₂(g) + PH3 (g) PCI 3 (g) + 3 HCI (g) AH = 570.4 kJ Report your answer to 3 sig figs. → 00 2:16 g.

Which of the following represents an endothermic reaction? O CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) + 890 kJ 2S02 (g) 25 (s) + 20, (g) + 376kJ O 2C2H6 (g) + 702 (g) → 4CO2 (g) + 6H2O(g) + 3120 kJ 2H20 (g) + 572 kJ → 2H2 (g) + O2 (g)

In the following reaction, how much heat (in kJ) is released when 6.35 moles of CH4 are burned? CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O(g) AH° = -802 kJ/mol

In the following reaction, what is the quantity of heat (in kJ) released when 3.91 moles of CH4 are burned? CH4 (g) + 2 O2 (g) → CO₂ (g) + 2 H₂O(g) AH° = -802 kJ/mol -