predict the signs of delta G, delta H, delta S, of the system
for the following processes
a)Ammonia melts at -60 degrees Celcius
b) ammonia melts at -77 Celcius (normal melting point of
Ammonia)
c) ammonia melts at 100 Celcius
A gaseous mixture of 25% CO, 25% CO2, 25% H2 and 25% H20 is
brought to a temperature T and 1atm. Equilbirium composition of the
gas mixture is determined by the following reaction
CO2 + H2 = CO + H20. Calulate the equilbirium composition of the
gaseous phase at 700K and at 1500K. Given G at 700K is
14kJ and at 1500K is -9.6kJ
Fe2O3(s) + 3 CO(g) —> 2 Fe(s) + 3 CO2(g)
delta H = ___
a. Calculate delta H for the reaction above using the
following know thermochemical reactions
2Fe(s) + 3/2 O2(g) —> Fe2O3(s) delta h=-824.2 kJ
CO(g) + 1/2 O2(g) —> CO2(g) delta h=-282.7.
b. Is this reaction endothermic, exothermic, or both? How do
you know?
Calculate delta H for the reaction H(g) + Br(g) = HBr(g), given
the following information:
H2(g) + Br2(g) = 2HBr(g) delta H = -72 kJ
H2(g) = 2H(g) delta H = +436 kJ
Br2(g)= 2Br(g) delta H = +224 kJ
Use delta H f and S to calculate delta G rxn (delta g not sys)
at 25 C for the reaction below:
4KClO3 (s) --> 4KClO4 (s) + KCL (s)
Delta H not f KCLO3 = -397.7 kj/mol; KCLO4 = -432.8 kJ/mol; KCL =
-436.7 kJ/mol
S KCLO3 = 143.1 kJ/mol ; KCLO4= 151.0 kJ/mol; KCL = 82.6 kJ/mol
Consider the following reaction: CO (g) + H2O (g) ⇌ CO2 (g) +
H2(g) If you start with a mixture containing 1.00 mol of CO and
1.00 mol of H2O, calculate the number of moles of each component in
the mixture when equilibrium is reached at 1000 °C. The mixture
contains 0.43 mol H2?
nCO =
nH2O =
nCO2 =
How do I work this out?
The system
CO2(g) + H2(g) H2O(g) + CO(g)
is at equilibrium at some
temperature. At equilibrium, a 4.00L vessel contains 1.00 mole CO2,
1.00 mole H2, 2.40 moles H2O, and 2.40 moles CO. How many moles of
CO2 must be added to this system to bring the equilibrium CO
concentration to 0.669 mol/L?
A. 0.498 moles
B.
0.993 moles
C.
0.429 moles
D.
0.069 moles
For C(s) + H2O(g) ⇌ CO(g) + H2(g) H = +. In which direction
will the reaction shift if heat is removed from the system, C is
added, H2O is removed, CO is added, and H2 is removed. (a) right,
left, no change, left, right (b) left, left, right, left, right (c)
left, right, left, left, right (d) left, no change, left, left,
right (e) None of the above
PS8.2. The equilibrium constant, KP, for the reaction CO2(g) +
H2(g) H2O(g) + CO(g) is 0.138. Calculate the partial pressure of
all species at equilibrium for each of the following original
mixtures: a) 1.36 atm of CO2 and 1.36 atm of H2. b) 0.87 atm of
CO2, 0.87 atm of H2 and 0.87 atm of H2O(g). c) 0.64 atm of H2O and
0.64 atm of CO.