Question
1,2,3,4,5,6,7,8, and 9
Which of the following statements is TRUE? There is a "heat tax" for every energy transaction. A spontaneous reaction is always a fast reaction. The entropy of a system always decreases for a spontaneous process. Perpetual motion machines are a possibility in the near future. None of the above are true. Consider the following reaction. Use the information here to determine the value of ASSurr at 298 K. Will this reaction will be spontaneous at this temperature? N2(g) + 2 O2(g) 2NO2(g) AH = +66.4 kJ Can 1 M HNO.iCaq) will dissolve iron? Calculate AGrxn degree for the reaction at 298K: 3C12(g) + 2CH4(g) CH3Cl(g) + CH2C12(l) + 3HCl(g) Calculate K for the reaction at 298 K. C2H5SH has AHOvaporization = 8.47 kJ/mole and S degree vaporization = 27.5 J/K mole. What is its boiling point? Calculate the Gibbs Free energy (AG) for the reaction at 25 degree C: NO(g) + 03(g) rightarrow N02(g) + 02(g) with P(NO) = 50. atm, P(Q3) = 100. atm, P(NQ2) = 10. atm and P(02) = 1.0 atm Calculate the S degree for the Galvanic cell based on the following half reactions: Sn4+ /Sn2+ with MnO4~/Mn2+(all species are aqueous). Write the line diagram for the celL Calculate AG degree for the cell. Circle the best oxidizing agent: Cl2 , Fe3+, K+, PbS04. Circle the best reducing agent: Cl~, S02, Cr, H2. How long will it take to electroplate 2.17 grams of Fe(s) out of an aqueous solution of FeCl2 using a current of 12.50 Amps?
Explanation / Answer
1. a) There is a "heat tax" for every energy transition... this is true
False :
b) an spontaneous reaction is not necesarily a fast reaction
c) the entropy of an spontaneous reaction is supposed to increase
d) perpetual motion machines are not possible since these would violate thermodynamic laws.
*hope this helps =)
