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![RhCls + H* > [RhHCls]5
[RHHCI:]s- + 2PMes > [RhHCls(PMe:):] AG = -2.4 x 10°
Еg. 1
Ед. 2
AG = -6.8 x 104](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc5c89124-7239-4022-9679-d43fc4bc29e1%2F20d6d43c-adbd-4d52-8af4-c60e8fb231de%2Fpeqi3xb_processed.png&w=3840&q=75)
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- Calculate AH for the reaction, N2H4(1) + O2(g) -----> N2(g) + 2H2O(1), from the following data: 2NH3(g) = 3N20(g) -----> 4N2(g) + 3H2O(1) N20(g) = 3H2(g) 2NH3(g0 + 1/2O2(g) -----> N2H4(1) + H2O(1) H2(g) + 1/2O2(g) AH = -1010 KJ -----> N2H4(1) + H2O(1) AH = -317 KJ AH = -143 KJ %3D -----> H2O(1) AH = -286 KJ18. From the following reacțions and thermal data at 25°C 3 2 Fe(s) +O:(g) 2 Fe,O:(s) ΔΗ - 196,500 cal %3D 1 2 FeO(s) + ; 0:(g) - Fe2O:(s) AH° = -67,900 cal Fe(s) + 2 H* (a = 1) = Fe++ (a = 1) + H2(g) AH° = -21,000 cal %3D %3D 1 H:(g) H* (a = 1) AHº = 0 cal %3D Hig) +0:(g) = H;0(1) AH° = -68,320 cal %3D calculate AH° of the reaction: FeO(s) + 2 H+ (a = 1) = H;0(1) + Fe++ (a = 1) %3DA. Determine whether the curved arrow(s) shown below generate a valid or invalid resonance structure. Draw the resonance structure that would result from each properly drawn arrow and identify the arrow pushing pattern (i.e. allylic positive charge, allylic lone pair, pi bond between atoms of a different electronegativity, lone pair adjacent to a positive charge, alternating pi bonds in a ring.
- 3) One of the main buffer systems found in living organisms is the phosphate buffer system, often used in biological research to mimic cellular conditions. The phosphate equilibrium reactions and their corresponding pKa's are as follows: H3PO4 = H* + H2PO, H2PO, = H+ + HPO?- HPO- = H+ + PO;- pKa1 pКаz —D 7.21 = 12.44 = 2.12 pKa3 (a) Given the above chemical reaction, write out the expression for K, of the buffer system which would predominate at neutral pH conditions. Justify your choice. (b) The human body, and many other lifeforms, prefer an internal pH of 7.2 to maintain homeostasis. However, some more acid-tolerant or basic-tolerant organisms can survive (and sometimes thrive) within different ranges of pH. Calculate the mass and moles of the correct acid and corresponding conjugate base solid (assume you have sodium salts of each base: NaH,PO4, Na,HPO4, and Na PO,) which are needed to make 500 mL of a 0.5 M buffer solution (0.5 M total, including the concentration of acid and base…Calculate the equilibrium constant for the phosphorylation of glucose to glucose 6-phosphate at 37.0 °C. 4.74 x10¬3 M-1 eq In the rat hepatocyte, the physiological concentrations of glucose and P; are maintained at approximately 4.8 mM. What is the equilibrium concentration of glucose 6-phosphate (G6P) obtained by the direct phosphorylation of glucose by P;? 8.75 x10-8 [G6P] = M IncorrectSupply coeffcients that balence the atoms and ions. Supply electrons (e-) that balence the charges. Balence the half-equation 1. Pb^2+ -> Pb^4+ ........ 2. ....... + Cl2 -> .......... Cl^- Blanence the following equation 3. ....... ClO3^- -> ........ Cl^- + ........ O2 4. ........ Al +........ Fe^2+ -> ......... Al^3+ + ........ Fe
- 73. Given the following data Ca(s) + 2C(graphite) Ca(s) + ¿O,(g) CaO(s) + H,O(1) C,H,(2) + 0,(g) Clgraphite) + O,(g) CaC,(s) ΔΗ--62.8 k → CaO(s) AH = -635.5 kJ Ca(OH), (aq) AH = -653.1 kJ 2CO,(g) + H,O(1) AH = -1300. kJ CO,(g) AH = -393.5 kJ calculate AH the reaction CaC,(s) + 2H,O(1) → Ca(OH),(aq) + C,H¿(g) IS ONIAWhen ethanol (CH;CH;OH) burns in oxygen, carbon dioxide and water are formed. (i) Write the equation which describes this reaction. (ii) Using the data below, calculate the value for AH° for the combustion of ethanol. AH; (CH;CH2OH(1)) = - 277.0 kJmol1 AH, (CO2(g)) = - 393.7 kJmol1 AH: (H2O()) = - 285.9 kJmol1c. For the reaction 2. CACO,(s) + 2H+ (aq)→ Ca (ag) + H,0(1) + CO, Species S J(mol K) CACO3 (s) 92.9 H* (ag) 0. Ca (aq) -53.1 H20(1) 69.95 CO, (9) 213.7 AS = JK