All Questions
11
questions
3
votes
0
answers
270
views
Is dehydration of cobalt(II) chloride hexahydrate dynamic equilibrium?
I know that the dehydration of cobalt(II) chloride hexahydrate is a reversible reaction, is it a dynamic equilibrium?
$$
\begin{align}
\ce{CoCl2·6H2O &<=> CoCl2·2H2O + 4 H2O}\tag{R1}\\
\ce{...
- 31
2
votes
1
answer
83
views
Finding equilibrium constant for the reaction between non-stoichiometric mix of gaseous components
$$\ce{CH3OH(g) + NOCl(g) <=> CH3ONO(g) + HCl(g)}$$
The volume of the container is $\pu{433 cm^3},$ $T = \pu{50 °C}.$ Methanol was added until the pressure was $\pu{50.1 mbar},$ then $\pu{0.059 g}...
- 1,095
2
votes
1
answer
665
views
Calculate Kc with dissociation degree
If I have the reaction
$$\ce{2HI (g) ⇌ H2(g) + I2(g)}$$
and know that at $T = \pu{448 °C}$ the dissociation degree $α = 0.2198,$ how do I calculate $K_c?$
I thought that it would be something like ...
- 1,095
-3
votes
1
answer
60
views
Entropy of reaction from these givens?
Reaction that happens at 380 Kelvin
$\begin{align} \Delta S^\circ _{sys} &=\pu{-130 J/molK}\\
C_p(\ce{C2H4})&=\pu{43.6 J/molK}\\
C_p(\ce{C2H5OH})&=\pu{65.9 J/molK}\\
C_p(\ce{H2O})&=\pu{...
- 127
0
votes
0
answers
40
views
Can there still exist equilibrium with a very high equilibrium constant?
Problem
Consider the reaction translated by:
$$\ce{2 CO(g) + O2(g) <=> 2 CO2(g)} \quad K_c = 2 \times 10^{22}~\text{at } \pu{1000 K}$$
The order of magnitude of the equilibrium constant, $K_c$,...
- 11
1
vote
0
answers
72
views
Hydrogen disulfide heterogenous equilibrium
Hydrogen sulfide can be removed from natural gas by the reaction
$$\ce{2 H2S(g) + SO2(g) -> 3 S(s) + 2 H2O(g)}$$
a) Calculate $ΔG^\circ$ and $K$ for this reaction at $\pu{298 K}.$
b) What is the ...
- 605
1
vote
0
answers
57
views
Calculating thermodynamic quantities for hydrogenation of iron nitride
HW#6.3 If the reaction
$$\ce{Fe2N(s) + 3/2 H2(g) <=> 2 Fe(s) + NH3(g)}$$
comes to an equilibrium at a total pressure of $\pu{1 bar},$ analysis of the gas shows that at $\pu{700 K}$ and $\pu{800 ...
0
votes
1
answer
3k
views
How can I calculate the equilibrium constant for this reaction?
Silver(II) oxide partially decomposes into solid silver and oxygen gas according to:
$$\ce{2 AgO(s) <=> 4 Ag(s) + O2(g)}$$
with enthalpy $H^\circ = \pu{62.0 kJ}$ and entropy $S^\circ = \pu{133.6 ...
- 9
4
votes
3
answers
2k
views
If change in free energy (G) is positive, how do those reactions still occur?
I was doing a couple of problems for homework:
Calculate $K_\mathrm{sp}$ of $\ce{AgI}$ at $55.0\ \mathrm{^\circ C}$
Calculate $K_\mathrm{b}$ of $\ce{NH3}$ at $36.0\ \mathrm{^\circ C}$
I have to use ...
2
votes
1
answer
200
views
Calculating the value of equilibrium constant in terms of pressure
A mixture of $\pu{1 g}$ of $\ce{H2(g)}$ and $\pu{1.06 g}$ $\ce{H2S(g)}$ in a $\pu{0.5 L}$ flask come to equilibrium at $\pu{1670 K}.$ At equilibrium, there are $\pu{8E-6 mol}$ of $\ce{S2(g)}$ present. ...
- 131
3
votes
2
answers
8k
views
What is the purpose of finding log k?
I understand that k alone is the equilibrium constant and know how to find this number or when given it I can take the log of this number, but what is the purpose of this number? What does the log of ...
- 39