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Energy is always conserved in a chemical reaction. If heat of reaction is positive, the mixture gets heated and may require external cooling to continue the reaction in the forward direction. If the reaction is endothermic, i.e. heat of reaction is negative, the mixture gets cooled and may need external supply of heat to maintain the reaction in forward direction. When the reaction is at an equilibrium, the heat of reaction is either zero or the mixture has attained an equilibrium with some definite ratios of the reaction products. The total energy of the system is conserved.

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16y ago
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14y ago

Adding 'energy' to either side of a dynamic equilibrium will lead to the equipartition of the energy. The simplest form of energy to consider is mass itself. Here, addition of energy can be understood with LeChatelier's principle. So for the equilibrium:
A<->B
Addition of B would be expected to lead to an increase in A.

Picturing the effect with pure 'energy' (intuitively, heat) you can talk about chemical A in two locations, (A) and A. So let's say the equilibrium was:
(A)<->A
And you add a bunch of energy to (A) say dropping a warm dialysis bad full of A into a cool bath equilibrated in A. Then, A will exchange locations until the two compartments are in thermal equilibrium.

Finally, consider heat itself as a reactant or product:
1: A <-> B + heat (exothermic reaction)
2: B + heat <-> C (endothermic reaction)
In these cases, heating reaction mixture 1 would decrease the equilibrium concentration of B, and for mixture 2 would increase the equilibrium concentration of C. [Note that the reactions usually come to equilibrium faster at higher temperatures, so these (kinetic) considerations may be more important for choosing reaction conditions.]

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Q: What happens if you add energy to either side of a dynamic equilibrium?
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When do you know dynamic equilibrium as occurred in a solution?

When it no longer absorbs or emits energy from the surroundings.


Where does dynamic equilibrium take place?

Where the energy going into a system equals that going out of it. An aircraft in steady, level flight is in equilibrium: Thrust=Drag, and Lift=Weight.


If a reaction in one direction releases energy the same reaction in the other direction will what?

absorb that same amount of energy to establish a dynamic equilibrium.


What happens to the energy supplied when water is evaporating?

Energy is conserved. It becomes the the dynamic energy of the water molecule.


What happens when thermal energy is transferred from a warmer object to a cooler object?

thermal equilibrium


Explain the difference between static equilibrium and dynamic equilibrium?

A chair has static equilibrium ... a bicycle has dynamic equilibrium.Dynamic implies movement while staticimplies stationary, but that is a bit misleading. Take an object traveling with a constant velocity in deep space (no air resistance and no gravity). It could be viewed as being as much at rest as an object sitting on a table. The mathematical or chemical use of equilibrium is better. In these cases there is no net change over time even though energy maybe expended. If a steady-state situation in which a reverse process is occurring has a corresponding forward process, at a rate which achieves an exact balance, it is said to be in dynamic equilibrium. With regard to the pressure and volume of water sealed in an exhausted vessel at a constant temperature, a balanced state of constant change is possible in which molecules are constantly being exchanged between ice, water, and water vapour phases. By definition this balanced state of constant change is dynamic equilibrium. Static equilibrium can refer to a steady-state situation with no dynamic forces acting on its potential energy in either reverse or forward processes. By definition, in a state of staticequilibrium there is balance, but no change, disturbance or movement.


What is dynamic equilibrium Describe what is happening to the liquid and vapor at the boundary of a liquid that is in dynamic equilibrium Is the overall balance of liquid and vapor changing?

1. Dynamic equilibrium is when the rate of vapour and liquid being produced has stabilized, and stopped changing. It's called dynamic equilibrium because the liquid hasn't stopped changing into vapour, and the vapour hasn't stopped changing into liquid, but the rates of these two changes has stabilized so that there is a constant amount of liquid and vapour present.2. At the boundary of the liquid, particles with sufficient energy break away from the liquid and become vapours, and vapour molecules with low energy, or those that make contact with the surface of the liquid, become bonded to the liquid. There is a constant exchange of particles, hence dynamicequilibrium3. No, the overall balance of liquid is constant, hence equilibrium.


What is true about the rate of evaporation in a dynamic equilibrium between the liquid state and the gas state?

It Occurs as water moleclues absorb energy and it also occurs at the surface of liqud.


What is difference between static energy and dynamic energy?

Dynamic energy is when an object is in motion. And startic energy is caused when the object is in place.


What happens to energy during a phase change?

Energy either transfers to the object or leaves the object.


What shape would the graph of U versus x have if a particle were in a region of neutral equilibrium?

In neutral equilibrium, displacement in either direction would not affect the potential energy of the particle, therefore, the graph would be horizontal.


Why does diffusion occur and does it always occur?

All Particles move using their kinetic energy. Diffusion occurs because of difference in concentrations. The higher the concentration gradient the faster the diffusion rate. When diffusion happens it mixes both concentrations to obtain an equal concentrations meaning equilibrium has been reached. However, particles still move about from one section to the other, so to be more specific we say that dynamic equilibrium has been reached.