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12. Predict the signs of the AG and AH for the following: a) Vaporization of water at 100°C. b) Vaporization of water above 100°C BONUS: 35 mL of 0.0025M KoCrO4 are MIXED with 75 mL of 0.000220M Pb(NOs)2. . Hint: Determine your overall and net ionic equations first!
1. Calculate AG°for the following reaction at 25°C using AG ° = AH ° - TAS° Fe2O3 (s) + 3 H2(g) → 2 Fe (s) + 3 H2O (1) 2. Calculate AG ° for the same reaction using AG°f values Fe2O3 (s) 3 H2(g) → 2 Fe (s) + + 3 H20 (1) + 3. Calculate AGº of the following reaction: 2C (s) H 2 (g) → C2H 2 (g) Use Hess' Law, AG° = AG°1 + AG°2 + AG°3...
1. For the process H2O(g) → H2O(l) at 105°C the signs on AG, AH, and AS are a)-, t, + b)t, -, - c) +, +, + d) +, t, - e)-, -, - 2. For the process H2O(l) → H2O(s) at -5°C the signs on AG, AH, and AS are a)-, +, + b) +, -, - c) +, +, + d) +, +, - e)-,-,- 3. For the process H2O(s) → H2O(l) at +5°C the signs on AG,...
13. For each of the following, write a balanced chemical equation and QUALITATIVELY predict the signs for AH, AS, and AG. State whether each reaction is spontaneous, nonspontaneous, or at equilibrium. Justify your answers. (a) The combustion of methane (CHA) under standard conditions. (b) Vaporizing water at 373 K and I atm. (C) Forming methanol (CH3OH) and oxygen gas from water vapor and carbon dioxide at 500.0 °C. BE
Predict the sign of AS for each of these changes. a) O2 (g) → O2 (aq) b) C.H. (8) → C.H. (1) - c) C(s) + CO2(g) → 2 CO (g) d) C12H22011 (8) ► 12H2011 (aq) e) 2 NO2(g) → N.04 (g) 2) Indicate the correct type of process for the following: Process Spontaneous Non-Spontaneous 1. Melting of ice cubes at -5°C and 1 atm pressure 2. Dissolution of sugar in a cup of hot coffee 3. Reaction of...
Q1 Q2 Q3 Is a reaction with the following values of AH and AS spontaneous at 350 K?. AH 107 kJ AS = - 285 J/K A. The reaction is not spontaneous. B. The reaction is spontaneous. C. The reaction is at equilibrium. D. Cannot be determined Which of the following reactions represent AG°f? A. Na (s) + 1/2 F2 (g) → NaF (s) B. 2 H2 (g) + O2 (g) + 2 H20 (1) C. H30+ (aq) + OH-...
10. Given that the AG for the hydrogen oxygen fuel cell reaction is -474.4 kJ/mol, calculate the E' and K for this fuel cell at 25°C: 2 H2(g) + O2(g) → 2 H20 (1)
9. The K, expression for Ag,CO, is A) (Ag ][CO; 4) B) (Ag"T[CO, C) (Ag 'Picco D) (Ag '1'[CO;-1/[Ag2CO3] 10. For the reaction H2(g) + 12 (6) + 2 HI At a temperature of 298 K, the equilibrium concentrations are [H.] =0.45 M; [12] = 0.050 M; and [HI] = 0.13 M, respectively. What is K ? A) 23 B) 111 C) 9.0 x 10 D) 0.75 11. A system is at equilibrium when A) Kg B) 4Gº=0 C) E°>...
AG°= AH-TAS AG=AGº+RTinQ where R=8.314 J/mol K 1. Calculate AGº for the following reaction at 25 °C if AH°= -1854 kJ/mol; AS°= -236 J/mol K CH-COCH3(g) + 402(g) → 3C02(g) + 3H2O(1) 2. NH.NO, dissolving in water is a spontaneous process. As it dissolves, the temperature of the solution decreases. Based on this, what must the signs (positive or negative) of AG, AH, and AS be?
5) Choose the best classification of the reaction represented by the following equation: Pb(NO3)2(ay)+CaClg(ay)-PbCl20)+ Ca(NO3)2(a) A) decomposition B) precipitation C) oxidation-reduction D) acid-base E) combustion 5) 6) 6) Choose the best classification of the reaction represented by the following equation: HBr(ay)+ KOH(ag)KBr(ag) + H20( A) acid-base B) precipitation C) combustion D) combination E) decomposition 7) 7) Magnesium hydroxide, Mg(OH)2, as "Milk of Magnesia" can be used to neutralize excess stomach acid, represented by HCl(ag) according to the chemical equation below....