please help. thank you!
1.True or False? The dissolving of an ionic salt (e.g., NaCl, LiBr, KF, etc.) in liquid water will
decrease the freedom of motion of the solute ions, thus AS° < 0. If false, please explain.
2. Calculate the change in standard molar entropy of the production of ammonia. At standard
temperature: AS ammonia = 192.5 J/mol*K, AS hydrogen = 130.6 J/mol*K, AS nitrogen = 191.5 J/
mol*K. Show all your work. Does your answer make sense? Please explain.
N2(g) + 3H2(g) 2NH3(g)
3. Give the equation for Gibbs Free Energy and define each variable and it's units.
4. Fill in the blanks. If AGsys
AGsys
then AS univ.
(Eq. 1)
0, then AS univ
0; and the reaction is spontaneous. If
0, then ASuniv 0; and the reaction is non-spontaneous. If AGsys.
0,
0; and the reaction is at chemical equalibrium.
5. Write the balance equation in which gaseous methane and water (as steam) react for form
gaseous carbon monoxide and hydrogen. Then, find the standard free energy of formation
values to calculate the AGrxn for the production of hydrogen from methane and water. Show all
your work.
