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Q2 (20 points): If the cell potential of a corrosion for Fe is 1.1TV. What e...
A Cr(s)|Cr3 (aq)||Fe3 (aq)|Fe(s) galvanic cell has a standard cell potential of 0.700 V. Calculate the...
A Cr(s)|Cr3 (aq)||Fe3 (aq)|Fe(s) galvanic cell has a standard cell potential of 0.700 V. Calculate the Gibbs free energy change at 25 °C when 2.61 g of iron is deposited. Assume the concentrations in the cell remain at the standard state values of 1 M through the entire deposition process. Calculate the maximum amount of work done by the cell on its surroundings.
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode...
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell: Pt(s)|H2(g,1atm)|H+(aq,1.0M)||Au3+(aq,?M)|Au(s). What is the concentration of Au3+ in the solution if Ecell is 1.26 V ? To what pH should you adjust a standard hydrogen electrode to get an electrode potential of -0.117 V ? (Assume that the partial pressure of hydrogen gas remains at 1 atm.) Express your answer using two decimal places.
If a liquid Fe V solution is equilibrated with pure solid VO and a gas containing...
If a liquid Fe V solution is equilibrated with pure solid VO and a gas containing Po2=4.72x10-10 atm, at 1800°C calculate the activity of V in the liquid solution with respect to the Henrian standard state. For the change of standard state V(s) V(1wt% in Fe) AGº--15480-45.61T in Joules. The standard Gibbs free energy change for the reaction Vel) + 1/2O2(g) VO(s) is AGº--424700+80.041 in the temperature range of 298K and 2000K. Molar mass of Fe is 55.85 g/mol and...
Plant water relations overview We use the term water potential (Ψw) to describe the chemical potential...
Plant water relations overview We use the term water potential (Ψw) to describe the chemical potential of water, and our understanding of diffusion of water depends on our understanding of how various factors (such as temperature, pressure, presence of dissolved solutes) affect the water potential in various parts of a system. Since diffusion of a substance tends to occur downward along a chemical potential or free energy gradient, it also is important to understand how such gradients are established. By...
This is physical chemistry problem from Atkins 5. [20 (1) The variation of chemical potential, u...
This is physical chemistry problem from
Atkins
5. [20 (1) The variation of chemical potential, u of a perfect gas with pressure can be expressed as follows: Au RT ln Derive the below equation for Gibbs energy of mixing, when two gases of A and B are mixed at constant pressure, p and temperature, T. (2) Calculate the molar Gibbs energy of mixing when the two major components of air (nitrogen and oxygen) are mixed to form air at 298...
1. [Suggested time 20-30 minutes] The reverse water gas shift (WGS) reaction occurs during many high temperature processes involving hydrocarbons and typically reaches equilibrium: coag) + H2(g)...
1. [Suggested time 20-30 minutes] The reverse water gas shift (WGS) reaction occurs during many high temperature processes involving hydrocarbons and typically reaches equilibrium: coag) + H2(g) 근 COe) + H2O(g) AG 298K (kJ/mol) AH1298K (kJ/mol) -137.66 -229.25 -395.51 0.00 -110.84 -242.52 -394.64 0.00 H20 (g) CO2(8) o lin 2 [3 points] Determine the standard Gibbs energy change for this reaction at 25°C b) c) [10 points] Calculate the equilibrium composition (molar fractions) for an isothermal reaction carried out at...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each)...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each) AE is independent on the initial and final state of a system. The sum of entropy changes of the system and surroundings is always positive. The ratio of numerical values of partial pressures of the reaction participants is unitless. Q is small if products pressures are small, a large Q means a negative or good (favorable) contribution to the free energy For pure solids...
please show the calculations for question 19 and 21 if possible. thanks. Question #19 An aqueous...
please show the calculations for question 19 and 21 if
possible. thanks.
Question #19 An aqueous HBr solution was prepared at 20°C with a pH of 3.00. In this solution, this is the concentration of hydrogen ions that originated from water dissociation: (1) 1.00 x 10-7 mol/L; (2) 7.40 x 10 mol/L; (3) 6.81 x 10-2 mol/l, (4) None of the above Question #20 The dissociation of HCI (HCI-H+Cl) has an equilibrium constant value of 2.00 x 109 at 25°C.'...
Question 1 (40 points) From potential flow theory, the combination of a doublet and a uniform flow gives the flowfi...
Question 1 (40 points) From potential flow theory, the combination of a doublet and a uniform flow gives the flowfield around a cylinder. The resulting velocity potential for the flow is given by: A cos Ur cos e The resulting velocity field in cylindrical coordinates is given by - = 4 r ae ar where e, and eo are the unit vectors in cylindrical polar coordinates, Uo is the free-stream velocity and A an arbitrary parameter. a) (10 points) Determine...
NUMBER 10 PLEASE -Kor Cor The Henry's law constant of oxygen in water at 25 °C...
NUMBER 10 PLEASE
-Kor Cor The Henry's law constant of oxygen in water at 25 °C is 773 atm mol'' kg of water. Calculate the molality of oxygen in water under a partial pressure of 0.20 atm. Assume that the solubility of oxygen in blood at 37 °C is roughly the same as that in water at 25 °C, comment on the prospect for our survival without hemoglobin molecules. The total volume of blood in the human body is about...
If a liquid Fe V solution is equilibrated with pure solid VO and a gas containing Po2=4.72x10-10 atm, at 1800°C calculate the activity of V in the liquid solution with respect to the Henrian standard state. For the change of standard state V(s) V(1wt% in Fe) AGº--15480-45.61T in Joules. The standard Gibbs free energy change for the reaction Vel) + 1/2O2(g) VO(s) is AGº--424700+80.041 in the temperature range of 298K and 2000K. Molar mass of Fe is 55.85 g/mol and...
This is physical chemistry problem from
Atkins
5. [20 (1) The variation of chemical potential, u of a perfect gas with pressure can be expressed as follows: Au RT ln Derive the below equation for Gibbs energy of mixing, when two gases of A and B are mixed at constant pressure, p and temperature, T. (2) Calculate the molar Gibbs energy of mixing when the two major components of air (nitrogen and oxygen) are mixed to form air at 298...
1. [Suggested time 20-30 minutes] The reverse water gas shift (WGS) reaction occurs during many high temperature processes involving hydrocarbons and typically reaches equilibrium: coag) + H2(g) 근 COe) + H2O(g) AG 298K (kJ/mol) AH1298K (kJ/mol) -137.66 -229.25 -395.51 0.00 -110.84 -242.52 -394.64 0.00 H20 (g) CO2(8) o lin 2 [3 points] Determine the standard Gibbs energy change for this reaction at 25°C b) c) [10 points] Calculate the equilibrium composition (molar fractions) for an isothermal reaction carried out at...
Justify the following sentences by answering (T) for TRUE or (F) for FALSE. (1 mark each) AE is independent on the initial and final state of a system. The sum of entropy changes of the system and surroundings is always positive. The ratio of numerical values of partial pressures of the reaction participants is unitless. Q is small if products pressures are small, a large Q means a negative or good (favorable) contribution to the free energy For pure solids...
please show the calculations for question 19 and 21 if
possible. thanks.
Question #19 An aqueous HBr solution was prepared at 20°C with a pH of 3.00. In this solution, this is the concentration of hydrogen ions that originated from water dissociation: (1) 1.00 x 10-7 mol/L; (2) 7.40 x 10 mol/L; (3) 6.81 x 10-2 mol/l, (4) None of the above Question #20 The dissociation of HCI (HCI-H+Cl) has an equilibrium constant value of 2.00 x 109 at 25°C.'...
Question 1 (40 points) From potential flow theory, the combination of a doublet and a uniform flow gives the flowfield around a cylinder. The resulting velocity potential for the flow is given by: A cos Ur cos e The resulting velocity field in cylindrical coordinates is given by - = 4 r ae ar where e, and eo are the unit vectors in cylindrical polar coordinates, Uo is the free-stream velocity and A an arbitrary parameter. a) (10 points) Determine...
NUMBER 10 PLEASE
-Kor Cor The Henry's law constant of oxygen in water at 25 °C is 773 atm mol'' kg of water. Calculate the molality of oxygen in water under a partial pressure of 0.20 atm. Assume that the solubility of oxygen in blood at 37 °C is roughly the same as that in water at 25 °C, comment on the prospect for our survival without hemoglobin molecules. The total volume of blood in the human body is about...
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