3.14 The change in Gibbs energy that accompanies the com- bustion of C6H12O6(s) to carbon dioxide and water vapour at 25 °C is -2828 kJ mol-1. The potential energy of an object of mass mat a height h, relative to that at the Earth's surface is given by mgh, where g = 9.81 ms-2 is the acceleration of free fall. How much glucose does a person of mass 65 kg need to consume to climb through 10 m?
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- (c) For reaction 1 taking place at 120 °C: Hg0(s) + S02(g)= Hg(1) + SO3(g) Reaction 1 AreactG® = -13.6 kJ mol-1 %3D (i) Given the standard Gibbs free energy above for reaction 1, calculate AreactG when the partial pressures for S0, and SO2 are 1 bar and 0.004, respectively. (ii) Calculate the equilibrium constant for the reaction and hence state what will be the mole fraction of SO3 in the gas phase at equilibrium. Note: In calculation assume K=÷; where the term x is the mole fraction of SO3. 1-x4. The reaction of metallic cobalt (Co) with oxygen can be described by Co(s) + O2 CoO(s) in which the label (s) indicates reactants and products in a solid form. The Gibbs energy change for this reaction at oxygen pressure po, = latm is given by the expression, kJ AG (T) = -500.8- kJ =)T molK mol + (0.164- in which T is the temperature in kelvin. This energy change is per mole of O2 consumed. You might refer to the Ellingham diagram discussed in class and included in the lecture slides to see if the numbers seem to match the plot for that particular reaction. a) Recall that AG = AH - TAS, and that AH and AS only display a weak temperature dependence. Compare to the above equation for AG, What does that tell you about the sign of AS for the reaction? Is it positive or negative? Explain why the sign makes sense for that particular reaction, and also note the slope of this reaction in the Ellingham diagram. Is it consistent? Note that the slopes in the Ellingham diagram relate to the…(b) (i) Mixtures of molten salts often result in high excess mixing enthalpies. Calorimetric experiments of a 25:75 mixture of NaCl and KCl revealed an enthalpy of mixing ΔmixH of -0.4095 kJ mol-1 . Calculate β for this mixture. (ii) Aluminium boils at 2737 K at 100.0 kPa pressure. Given that at 100.0 kPa the molar heat capacity (Cp) of liquid aluminium is 29.30 J K-1 mol-1 , and of aluminium gas is 20.79 J K-1 mol-1 , calculate the total entropy change for the reaction: Al(liquid, 2000 K) → Al (gas, 3500 K). ΔvapS = 49.24 J K-1 mol-1
- (c) For reaction 1 taking place at 120 °C: Hg0(s) + S02(g) = Hg(l) + S03(g) Reaction 1 AreactG = -13.6 kJ mol-1 (i) Given the standard Gibbs free energy above for reaction 1, calculate AreactG when the partial pressures for S0, and SO2 are 1 bar and 0.004, respectively. (ii) Calculate the equilibrium constant for the reaction and hence state what will be the mole fraction of SO3 in the gas phase at equilibrium. Note: In calculation assume K=÷; where the term x is the mole fraction of SO3. 1-xIn a particular biokgikal reaction taking place in the body at 37 C, the change in enthalpy was -125 kJ mol' and the change in entropy was -126 JK' mol". (a) Cakulate the change in Gibbs energy. (b) Is the reaction spontaneous? (e) Cakulate the total change in entropy of the system and the surroundings.The reduction of iron(III) oxide (Fe,0,) to pure iron during the first step of steelmaking, 2 Fe,0, (s) – - 4 Fe(s) + 30,() is driven by the high-temperature combustion of coke, a purified form of coal: 圖 C(s) + 0,(g) → Co, (g) dlo Suppose at the temperature of a blast furnace the Gibbs free energies of formation AG, of CO, and Fe, O, are -428. kJ/mol and -833. kJ/mol, respectively. Calculate the minimum mass of coke needed to produce 2000. kg of pure iron. Round your answer to 2 significant digits. Okg Explanation Check O 2021 McGraw-Hill Education. AlI Rights Reserved. Terms of Use| Privacy | Accessibility
- 17D.1. (a) What is the specific heatof liquid water? (b) What is themolar heat capacity of liquid water?(c) What is the heat capacity of 185 gof liquid water? (d) How many kJ ofheat are needed to raise thetemperature of 10.00 kg of liquidwater from 24.6 °C to 46.2 °C?(a)At 0 oC, liquid water and ice are in equilibrium at standard pressure, so they have the SAME molar Gibbs energy. When raise from 1.0 bar to 100 bar, how much Gibbs free energy change in the liquid phase ? (molar mass of water 18 g mol-1; mass density of ice = 0.9150 g cm-3; mass density of liquid water, 0.9999 g cm-3) Set the initial Gibbs energy = 0 if you like. (b) how much Gibbs free energy change in the solid phase? c) under this process according to your calculation , solid changes to liquid. Liquid changes to solidIm confused how do i solve?
- 3.(10p) The molar volume of a certain solid is 142.0 cm3mol-1 at 1.00 atm and 427.15 K, its melting temperature. The molar volume of the liquid at this temperature and pressure is 152.6 cm3mol-1. At 1.2 MPa, the melting. temperature changes to 429.26K. Calculate the enthalpy and entropy of fusion of the solid using the Clapeyron equation.i need the answer quicklyThe reduction of iron(III) oxide (Fe₂O,) to pure iron during the first step of steelmaking, 4 - 4 Fe(s) + 30, (e) 4 2 Fe,0,(3) is driven by the high-temperature combustion of coke, a purified form of coal: C(s) + O₂(e) co₂(e) Suppose at the temperature of a blast furnace the Gibbs free energies of formation AG, of CO, and Fe₂O, are-413. kl/mol and -826. kJ/mel, respectively. Calculate the maximum mass of pure iron that can be produced by the combustion of 6200. kg of cake. Round your answer to 2 significant digits. A kg 0.P 00 1.60 9