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Styrene is produced by catalytic dehydrogenation of ethylbenzene at high temperature in the presence of superheated steam. A.) Given the following data, what is the delta Hrxn, delta Grxn and delta Srxn at 298 K. Ethylbenzene, C6H5--CH2CH3 : delta Ht = -12.5 kJ/mol, delta Gt = 119.7 kJ/mol and S = 255 J/mol*K Styrene, C6H5--CH==CH2 : delta Ht = 103.8 kJ/mol, delta Gt = 202.5 kJ/mol and S = 238 J/mol*K B.) At what temperature is the reaction spontaneous?
Assume that methane is an ideal gas, the specific heat capacity of water to be constant and equal to 4.184 J/g/K over this temperature range, and the density of water to be 1.0 g/cm3. The combustion of methane is given byCH4 + 2 O2 ? CO2 + 2 H2O ?..
What is the percentage ionization of the acid? What is the value of Ka for the acid? 2) Periodic acid, HIO4, is an important oxidizing agent and a moderately strong acid. In a 0.20 M solution
Calculate the attractive force (in Newtons) between a cation with a valence of +3 and an anion with a valence of -2, the centers
The men's world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.800 miles.
For a solution having 1.00 x 10^-3 equivalents/L total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+] = 4.69 x 10^-11, what is the percentage contribution to alkalinity from CO32-
Why are the standard reagents used in neutralization titrations generally strong acids and bases rather than weak acids and bases?
50.0 ml of 0.987 M HCl was mixed with 50.0 ml of 1.02 M NaOH, the heat of neutralization was calculated to be -2.7 kJ. What is the enthalpy (molar heat) of neutralization?
Calculate the deltaG in kJ for this reaction at 37 oC to the nearest tenth of kJ. Only include the numerical part of your answer, do not include units
A two-component mixture containing 1-octene and 1,4-dimethylbenzene gave only one spot with an Rf value of 0.95. The solvent used was acetone.
Tell wheter each of the experimental errors in Exercise 3 will affect the melting point of the unknown component. If it will, tell how it will affect the melting point and explain why
Calculate the temperature at which H2 may be obtained by spontaneous composition of water. Comment on feasibility of producing H2 by this means
Given that Ea for a certain biological reaction is 48kJ/mol and that the rate constant is 2.5 x 10^-2 s-1 at 15 degrees celsius
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