I only need two of these questions answered -one of either 5 and 6 My gas: Bromo
ID: 1076800 • Letter: I
Question
I only need two of these questions answered -one of either 5 and 6 My gas: Bromobenzene a: 28.94 mber. b: 0.153 1Imol nol 7. Each student has been assigned a common gas or volatile liquid compound. (A) Do you expect the compound you have been assigned behave like an ideal gas at standard temperature and pressure? (This can be quantified by comparing the pressure of the compound using the Van der Waals equation of state to that of the ideal gas equation of state) [Report all calculated pressures in units of atmospheres, atm] (B) At what molar volume does the compound you have been assigned deviate substantially from ideality (i.e, from the behavior that would be expected based on the ideal gas law)? (This can be quantified by determining what conditions cause a > 5% deviation from the ideal gas equation of state) Report all calculated pressures in units of atmospheres, atm]Explanation / Answer
5.the reaction to form liquid water is H2(g)+ 0.5O2(g)------->H2O(l), during the course of reaction, the product is liquid and reactants are gases. Gases will have more entropy than liquid and entropy change = sum of entropy of products- sum of entropy of reactants, so entropy decreases.
6. given latent heat of vaproization = 39.3 KJ/mole, moles of ethanol in 1.25Oz= 37gm, mass/molar mass = 37/46=0.80
heat required for vaporization of 0.8 moles = 39.3*0.8 KJ=31.44KJ=31.44*1000J
boilnjg point in K= 78.3+273=351.3K
hence entropy change= 31.44*1000/351.3 J/K=89.5 J/K, Since entropy change during vaporization is +ve. Since gas will have more entropy than liquid. ( D is correct)