Calculate ASuniy for the following reaction at 300K. 2 NO(g) O2(g) 2NO2(g) AHxn = -114 kJ ASrxn = -72.6 J/K Answer:

Be sure to answer all parts. For the gaseous reaction of carbon monoxide and chlorine to form phosgene (COCl₂), perform the following calculations. (a) Calculate the AS at 298 K (AH° = −220. kJ/mol and AG° = −206 kJ/mol). kJ/mol K (b) Assuming that AS and AH change little with temperature, calculate AG at 450. K. kJ/mol

Hint: No calculations are required. For the reaction 2HBr(g) + Cl2(g)- >2HCI(g) + Br2(g) AH° = -81.1 kJ and AS° =-1.20 J/K At standard conditions, this reaction would be product favored O at all temperatures. O at relatively high temperatures. O at no temperature. O at relatively low temperatures.

18

Determine the AU°reaction at 25 °C (in kJ/mol) for the following reaction: 2NO(g) + O2(g)→2NO2(g) Appendix D kJ/mol

Use the data shown below, to calculate AH°rxn and AS°rxn at 25°C for the following reaction: 3 H₂(g) + Fe₂O₂(s) → 2 Fe(s) + 3 H₂O(g) What is the value of AGᵒrxn at 25°C? Substance: H₂(g) AHof (kJ.mol-¹) 0 So (J.K-¹.mol-¹) 130.7 Fe₂O3(s) -824.2 87.40 Fe(s) 0 27.28 H₂O(g) -241.8 188.8

A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 74.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = 181. kJ AS = -499. K ? 2NO(g) N, (g) + 0, (g) AG = kJ Which is spontaneous? this reaction the reverse reaction neither

Given the following information, calculate AGO for the reaction below at 27 °C. Ni(s) + 1/2O₂(g) → NIO(s) ΔΗ, = -401.7 kJ and AS° = -94.6 J/K KJ

Calculate G for the reaction of iron (III) oxide with carbon monoxide to give elemental iron and carbon dioxide. í G₁ (kJ/mol) Fe(s) 0 CO₂(g) -394.4 Fe₂O3(s) -741.0 CO(g) -137.3

Given the information below: 3M(g) = K.=6.88 × 10~3 27(g) 2Z(g) = 3Q(g)+6X(g) K,=3.12 × 102