Which of the following is a formation reaction? Xe(g) + 2 F₂(g) XeF4(s) H₂O(l) H₂O(s) CO(g) + 2 H₂(g) CH₂OH(g) 2 Na₂OH(aq) + H₂SO₂(aq) 2 Na SO (aq) + 2 H₂O() O IIII

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 reaction below is a  exothermic or endothermic reaction. 2SO3(g) + Heat ⇋ 2SO2(g) + O2(g)

4. When 1.00 L of 1.05 M Ba(NO3)2 solution is mixed with 1.00 L of 1.10 M NazSO4 solution at 25.0°C in a coffee-cup calorimeter. The reaction is Ba(NOs)2(aq) + NazSO4(aq) → BaSO4(s) + 2NANO:(aq). The final temperature of the mixture increases to 28.1°C. Calculate the enthalpy change per mole for this process. (Assuming C=4.18 J °C' g' and density of the final solution is 1.05 g/ml).

Using the equations H₂ (g) + Cl₂ (g) → 2 HCI (g) AH° = -184.6 kJ/mol C (s) + 2 Cl₂ (g) →→ CCI (g) AH° = -95.7 kJ/mol Determine the molar enthalpy (in kJ/mol) for the reaction C (s) + 4 HCI (g) → CCI (g) + 2 H₂ (g). 4 2

The sugar arabinose, C5 H10 O5, is burned completely in oxygen in a calorimeter. C5 H10 O5 (8) + 502(g) → 5CO2(g) + 5H2 O(1) Burning a 0.541 g sample caused the temperature to rise from 20.00°C to 20.54°C. The heat capacity of the calorimeter and its contents is 15.2 kJ/°C. Calculate AH for the combustion reaction per mole of arabinose. ΔΗ+ kJ/mol

In the following equation for a chemical reaction, the notation (s), (1), or (g) indicates whether the substance indicated is in the solid, liquid, or gaseous state. 2NO(g) + 2H2(g) →N2(g) + 2H,O(M) + energy Identify each of the following as a product or a reactant: H2O)| NO(g) N2(g) H2(g) When the reaction takes place energy is The reaction is

what is the enthalpy of this equation

Which of the reactions are exothermic?

Ammonia reacts with oxygen according to the equation: 4NH3(g)+5O2(g)→4NO(g)+6H2O(g),ΔHrxn=−906 kJ. Calculate the heat (in kJ) associated with the complete reaction of 155 g of NH3 Express the heat in kilojoules to three significant figures.