All Questions
Tagged with pressure equilibrium
57 questions
0
votes
0
answers
80
views
If a pocket of nitrogen gas is pumped in at the bottom intake of a padded tank will the pocket of gas bubble up?
I have a nitrogen gas padded tank (tank 1) which is filled from the bottom of the tank. Tank has a set point of 30 psi which adjusted as tank level changes. Also at the inlet is an additional pipe ...
- 19
3
votes
1
answer
120
views
Effect of Pressure on the Position of Equilibrium
The following general reaction proceeds with decrease in amount of substance, so increasing pressure should shift the position of equilibrium to the right.
$$\ce{2 A(g) <=> B(g)}$$
But let's say ...
- 47
-2
votes
1
answer
90
views
Pressure before equilibrium = Pressure during equilibrium?
For example, let's say we have the equation $$\ce{PCl_3(g) + Cl_2(g) -> PCl_5(g)},$$ and the temperature is held constant.
Would the pressure in the container when equilibrium is reached be greater ...
- 79
0
votes
4
answers
175
views
Which way Le Chatelier's principle
I have been pondering about the effect of pressure change in regard to Le Chatelier's principle on reactions. For this, I considered the following reaction:
$$\ce{CO(g) + 3H2(g) <=> CH4(g) + H2O(...
- 752
3
votes
1
answer
274
views
How does pressure affect the color of reaction medium with equimolar amounts or reactants and products at equilibrium?
Chlorine gas is pale yellow-green, and both hydrogen and hydrogen chloride are colorless gases. According to the Le Chatelier's principle, the change in pressure will not affect the following ...
- 41
0
votes
2
answers
664
views
Effect of Pressure on Equilibrium
This might be a little bit of a basic question, but I've been trying to get my head around pressure and Le Chatelier's principle and I can't quite understand it.
Currently, my understanding of Le ...
- 29
-1
votes
1
answer
46
views
What would happen if I increase the pressure and temperature of a gas present in a container
Assume the gas to be a real gas and the container to be made of diamond or anything stronger than that. Take the amount of gas to be 2mL and the pressure is increased with the help of strongest ...
- 11
1
vote
0
answers
106
views
Density and partial pressure [closed]
A sample of $\ce{NOBr}$ gas was placed in a rigid flask where it decomposes at $\pu{25 ^\circ C}$ according to the following reaction:
$$\ce{2NOBr(g) <=> 2NO(g) + Br2(g)}$$
At equilibrium, the ...
0
votes
1
answer
550
views
What's the equilibrium pressure of CO2 gas over sodium hydroxide?
Many (too many) decades ago in physical chemistry lessons, I seem to recall that given the enthalpy changes of reactions, and maybe phase diagrams, one could work out what equilibrium a reaction would ...
- 141
-3
votes
1
answer
549
views
How to calculate Kp without knowing the volume? [closed]
I have the following chemical equation:
$$\ce{Sb2S3 + 3H2 <=> 2 Sb + 3H2S}$$
I have $\pu{1000 grams}$ of $\ce{Sb2S3}$ that reacts with $\pu{10 grams}$ of $\ce{H2}$ in a reactor at $\pu{713 K}$.
...
5
votes
1
answer
2k
views
Does pressure affect pH? [closed]
Since pH is the function of $\ce{H+}$ ion concentration, the change in volume will change the equilibrium according to Le Chatelier's principle and affect the pH. Is it correct, or are there any ...
- 73
0
votes
1
answer
171
views
Effect of addition of inert gas on concentration in an equilibrium [duplicate]
We have the following equilibrium established in a container with movable piston at atmospheric pressure.
$$\ce{N_2 (g) + 3 H2 (g) ⇌ 2NH_3 (g)}$$
Now how does the concentration of the reacting species ...
- 11
3
votes
1
answer
620
views
Relative humidity and vapor-pressure in equilibrium
I have quite an unclear understanding of relative humidity. I am writing my understanding on the topic and please correct me wherever I'm wrong:
What I understood:
Let's say $\ce{H2O}$ has a (...
- 583
0
votes
0
answers
67
views
Osmotic Pressure of Aqueous Solution
The osmotic pressure of an aqueous solution at $25$ Celsius is $92.0$ $kPa$. Calculate the boiling point
of the solution. (Assume that the density of the solution is $1.0$ $g/mL$, ignore the mass of ...
- 117
-1
votes
1
answer
60
views
Doesn't adding an inert gas at constant volume increase the partial pressures?
When you add an inert gas to a container of constant volume full of gases, you are basically shoving the inert gas into the container and increasing the pressure inside the container, so the partial ...
- 1
1
vote
1
answer
49
views
Reaction stoichiometry for calculation of Kp
NH$_2$CO$_2$NH$_4$(s)⇌$2$ NH$_3$(g)+ CO$_2$(g)
I want to calculate K$_p$ for the reaction above, given that the total pressure is $0.63$ bar.
My calculations:
$0.63$ = p(CO$_2$) + p(NH$_3$)
, where ...
- 1,095
2
votes
1
answer
84
views
Finding equilibrium constant for the reaction between non-stoichiometric mix of gaseous components
$$\ce{CH3OH(g) + NOCl(g) <=> CH3ONO(g) + HCl(g)}$$
The volume of the container is $\pu{433 cm^3},$ $T = \pu{50 °C}.$ Methanol was added until the pressure was $\pu{50.1 mbar},$ then $\pu{0.059 g}...
- 1,095
0
votes
0
answers
29
views
Can I mix pressures and concentrations when finding equilibrium constant? [duplicate]
In order to find the equilibrium constant (or reaction quotient) I know I can find the value as the products over reactants raised to coefficient exponents. But, in all of the problems I have had to ...
- 129
1
vote
2
answers
87
views
Is is valid to compare reaction quotient to $K_p$ as well as $K_c$?
Can I use the reaction quotient compared to $K_p$ to answer the following question?
The solid $\ce{XY}$ decomposes into gaseous $\ce{X}$ and $\ce{Y}$: $\ce{XY(s) <=> X(g) + Y(g)}$ with a $K_p = ...
- 129
3
votes
2
answers
296
views
Effect on mass when decreasing pressure in equilibrium reaction
For example, if we have the reaction:
$$\ce{A + B <=> C}$$
And the volume is decreased, the pressure would increase. Hence, according to Le chatelier's principle, the system will partially ...
- 87
2
votes
2
answers
215
views
Changing pressure on equilibrium
Recently I heard my teacher say that when increasing the total pressure of the system, the reaction which is "more dependent on collisions" is favoured.
This seems to make sense, although I'...
- 71
-1
votes
1
answer
145
views
Latent Heat, Vapor pressure and Equilibrium [duplicate]
So after reading about this topic i wanted to share what i learned and i wanted you guys to tell me if what i am writting is correct:
A pressure vessel has propane inside and it is pressurized. The ...
- 21
2
votes
0
answers
175
views
Measuring vapour pressure in a closed system
My experiment requires the determination of vapour pressure from which I will calculate the number density (or number of moles of the molecule) later, for a closed system.
Here's my setup :
Liquid ...
- 1,582
1
vote
1
answer
1k
views
Why are pressure or volume not able to change the equilibrium constant? [duplicate]
It is stated in my textbook that temperature is the only factor that can change the equilibrium constant. According to the Ideal Gas Law, temperature is dependent on the pressure and volume. Thus, ...
- 29
3
votes
1
answer
449
views
Percent degree of dissociation of gas by pressure
I stumbled across the following interesting problem:
Assume that you have started to live on a new planet where standard pressure condition is $\pu{2 bar}$, standard concentration is $\pu{1 M},$ and ...
- 605
0
votes
3
answers
4k
views
What's the effect of Pressure change in Chemical Equilibrium if any reactant or product is Solid or Liquid?
I am studying Le Chatelier's Principle of Chemical Equilibrium. I am trying to solve a problem involving the effect of a pressure change on a chemical equilibrium.
I know that if a reversible reaction ...
- 11
1
vote
1
answer
205
views
Equilibrium: Effect of change in composition and value of Kp, Kc on changing pressure
Di-hydrogen gas is obtained from natural gas by partial oxidation with steam as per following endothermic reaction:
$CH_4{_{(g)}}+H_2O_{(g)} \ce{<=>} CO_{(g)}+3H_2{_{(g)}}$
How will ...
0
votes
0
answers
34
views
how to Find $P_{tot}$ Given that $K_p = 28.5$ and the partial pressure at equilibrium
I have the equilibrium equation :
$4KO_2{_{(s)}} + 2CO_2{_{(g)}} \ce{<=>} 2K_2CO_3{_{(s)}} + 3O_2{_{(g)}}~~k_p = 28.5 ~at ~25C$.
Given that The partial Pressure of $CO_2$ is $0.191~atm$ at ...
0
votes
1
answer
192
views
What exactly causes equilibrium to shift when pressure is decreased? [duplicate]
Take the reaction:
$$\ce{N2(g) + 3 H2(g) <=> 2 NH3(g)}$$
If pressure is decreased, equilibrium shifts to the left because it has more moles. I understand the basics of why this is, i.e. due to ...
- 11
6
votes
0
answers
74
views
Using Le Chatelier's Principle to Change Mechanical Energy to Chemical Energy
I was interested in an application of Le Chatelier's principle, where an increase in pressure could result in a decrease in the moles of gas.
In particular, a situation where when the pressure ...
- 169
2
votes
2
answers
1k
views
Calculating partial pressure of carbon monoxide
$\ce{ZnO}$ is exposed to pure $\ce{CO}$ at $\pu{1300 K}$ and the equilibrium
$$\ce{ZnO(s) + CO(g) <=> Zn(g) + CO2(g)}$$
is then established at $\pu{1 atm}$ pressure. The density of the gas ...
- 224
1
vote
2
answers
642
views
Why does reducing the pressure in an equilibrium reaction favour the side with more moles of gas?
I was trying to explain it in terms of reaction rates and such; more than just 'Le Chatelier's principle states ...', but I can't figure out the underlying reason as to why. I can explain why for ...
- 23
0
votes
1
answer
3k
views
Calculating partial pressure equilibrium constant Kₚ given initial pressure and equilibrium pressure
A reaction
$$\ce{A(g) <=> B(g) + C(g)}$$
happens in constant volume and constant temperature. The reaction starts only with gas $\ce{A}$ (no $\ce{B}$ or $\ce{C}$) with given pressure $P_1 = \pu{...
- 173
-2
votes
3
answers
272
views
How can equilibrium lie to one side ? Surely it’s not at equilibrium anymore? [closed]
Surely they’re not at equilibrium any more?
I understand that a favourable condition can make a reaction in one direction go faster, but then surely either the forward or backward reaction is faster ...
3
votes
2
answers
396
views
Can a reactor be operated at both reflux and above atmospheric pressure?
I'm not a chemist by trade so my experience in the lab has probably not been as in-depth as most of you. I've been tasked with investigating a proposed reaction in which an organic mixture (mostly ...
- 41
0
votes
1
answer
2k
views
Calculating Equilibrium Partial Pressures Given Kp and Mass
For the reaction
$$\ce{AsCl5(g) <=> AsCl3(g) + Cl2(g)}$$
at $550$ K, the equilibrium constant ($K_p$) is $9.81$. Suppose that $3.150 \ g$ $\ce{AsCl5}$ is placed in an evacuated $600$ ml ...
2
votes
0
answers
65
views
Defining the partial pressure equilibrium concentration
First off, I am not a chemist. I'm an engineer with an interest in thermodynamics for engine simulation for the basis of emissions. So if I have asked something stupid, this will be why.
So I am ...
- 21
2
votes
4
answers
2k
views
Changes in pressure for an equilibrium reaction containing a solid/liquid on one side only
For a reaction where there is only one solid/liquid present, but gases present as both reactants and products (are there any examples of this type of reaction?):
$$\ce{A(s) + B(g) <=> C(g)},$$
...
- 29
1
vote
0
answers
41
views
Does the way a reaction with gas moles shifts depend on Q or number of moles on either side of the reaction?
Given a container with the reaction $\ce{C2H4{(g)} + HCl{(g)} -> C2H5Cl{(g)}}$, if we inject $\ce{C2H5Cl{(g)}}$ to the container, what will happen?
I thought of this in two different ways and got ...
- 614
1
vote
0
answers
103
views
What causes both components of a binary gas mix to condensate at the same time for a given composition
Okay, so recently I encountered the temperature - mole fraction diagrams for binary vapour-liquid equilibrium. For now, I only consider two-component systems where the components are very similar and ...
- 71
4
votes
2
answers
717
views
Le Chatelier’s principle when pressure of gases increased with the same stoichiometric coefficient
$$\ce{C (s) + H2O (g) <=> CO2 (g) + H2 (g)}$$
What will happen to the equilibrium when the pressure of gases is increased? What will happen to the yield of $\ce{H2}$?
Since pressure increased ...
- 87
0
votes
3
answers
795
views
Pressure dependency in Haber Bosch ammonia synthesis
Haber-Bosch ammonia synthesis reaction:
$$\ce{3H2 +N2 -> 2NH3}$$
According to the ideal gas law: $pV=nRT$ where constant volume implies $\displaystyle \frac nV=\frac p{RT}$
Then $\displaystyle ...
- 11
1
vote
1
answer
635
views
Does temperature change pressure in isochoric system?
Consider the following equilibrium reaction:
$$\ce{2 NOCl (g) <=> 2 NO (g) + Cl2 (g)} \qquad \Delta H > 0$$
My textbook has a statement that:
If you decrease the temperature when ...
user43236
0
votes
0
answers
170
views
How does Le Chatelier's principle apply to a fuel tank full of hydrogen?
A nano-tube packed fuel tank is full of Hydrogen, and there is a steady pressure of Hydrogen in the tank. While hydrogen gas is being removed from the fuel tank to power the car, the pressure in the ...
- 495
5
votes
2
answers
7k
views
How does the partial pressure of gas C change with the change in volume of the container?
Suppose I have the equilibrium in a closed container:
$$\ce{3A(s) + 4B(g) -> 4C(g) + D(s)}$$
What happens to the partial pressure of C if the volume of the container is halved?
I was pondering ...
- 91
0
votes
4
answers
3k
views
Is vapour pressure of a liquid solution constant at a given temperature, no matter the size of closed container and amount of liquid taken?
Does vapour pressure of a liquid solution depend on the size of the closed container, the amount of solution taken, given that, the temperature is kept constant? Or will it change if some extra gas is ...
- 151
-4
votes
2
answers
13k
views
How does equilibrium change when pressure is increased? [closed]
What happens to the equilibrium when an increase in pressure is applied to a system with the same number of moles of gas on both sides of the reaction, according to Le Chatelier's Principle?
For ...
- 1
1
vote
0
answers
125
views
Find Equilibrium Constant with only balanced equation?
Calculate the value of $K_p$ for the following equation:
$$\ce{PCl3 (g) + Cl2 (g) <=> PCl5 (g)} ,\qquad \mathrm{R = 0.0821 \frac{L\times atm}{mol\times K}}$$
This question appeared on my test. ...
- 21
2
votes
2
answers
413
views
Finding the value of pressure equilibrium constant
Question:
A rigid vessel containing only $\ce{NO2(g)}$ is heated to $\pu{337^{ \circ}C}$ and allowed to come to equilibrium according to the following reaction:
$$\ce{2NO2 <=> 2NO + O2}$$ ...
1
vote
2
answers
6k
views
The effect of pressure on boiling point?
My textbook states the following:
Qualitatively, I understand why the boiling point of a substance increases when the pressure is increased. However, I learned that if the pressure is increased when ...
user33789