Chapter 16, Problem 67AP

Use ΔHf0  listed below to calculate ΔH0rxn for  the reaction                                                                           C     +   4 HNO3  ---->  CO2     +  4 NO2   +   2 H2O                                             ΔHf0  (kJ/mol)        0            -174.1         -393.5         33.2          -285.8

3) A redox titration: 160.00 mL of 0.0500 M Sn2+ solution was titrated with 0.200 M Ce according to the reaction below. Buret containing Ce Calomel reference electrode. 0.00500 M Sn Magnetic stirring bar Titration reaction: 2 Ce++ Sn2+-------> 2 Ce3+ + Sn4+ Eº Cee-------> Ce3+ Sn+ + 2e------> Sn²+ 1.470 V 0.139 V a) What is V. (the equivalence volume) (of Ce") needed to reach the endpoint? b) Calculate the potential (voltage), when 10.00 mL Ce" is added. c) What is the cell potential at the equivalence point? d) What is the cell potential when 60 mL Ce4+ is added? SCE = +0.241 V

can you show me how to do the mechanisms and correct arrows?

How many grams of CO2 are produced per 1.00 x 104 kJ of heat released by the combustion of butane, C4H10?             2 C4H10 + 13 O2  ---->   8 CO2   +  10 H2O                    ΔHorxn = -5314 kJ

H Draw the major product.Ignore inorganic byproducts

Calculate the heat of reaction for: 2 C  + 4 H2  +  O2  ---->  2 CH3OH given: C  + O2  ---->  CO2  ΔH = -393.5 kJ given: 2 H2 + O2  ---->  2 H2O  ΔH = -571.6 kJ given: 2 CH3OH  + 3 O2  ----> 2 CO2  + 4 H2O ΔH = -1452.8 kJ

The burning of 48.7 g of ZnS in the presence of oxygen gives 220.0 kJ of heat.  What is ΔH for the reaction as  written below?                                                                                    2 ZnS  +  3 O2   ---->  2 ZnO   +  2 SO2

12.18 In a 0.300 mol/kg aqueous solution of sucrose, the C12H22O11 molarity is 0.282 mol/dm³ at 20°C and 1 atm. The density of water is 0.998 g/cm³ at 20°C and 1 atm. (a) Estimate the osmotic pressure of this solution using the van't Hoff equa- tion. (b) The observed osmotic pressure of this solution is 7.61 atm. Use Eq. (12.24) to find a and Yн in this solution. Note: Yд in (12.24) is at the pressure P + II, but the pressure dependence of y is slight and can be neglected here.

The vapor pressure of water at 110°C is 1074.6 torr. Find the vapor pressure at 110°C of a 2.00 wt % sucrose (C12H22O11) solution in water. State any approximations made.