A chemical reaction that can proceed forward or backward is?
831592
I would give you thumbs up but i cant\nreversible is correct
565982
it allows for basic chemical reactions to take place.   same as animals but on a different level
747354
A reversible reaction can go in both directions.\nAn irreversible reaction cannot.\n\nAn example of a chemical reaction that can go in both directions could be the reactions between rust, hydrogen and water.\nPassing hydrogen gas over rust yields iron and water.\nFe3O4(s) + 4H2(g) --> 3Fe(s) + 4H2O(g)\nBut passing steam over hot iron produces rust and hydrogen.\nFe3O4(s) + 4H2(g) <-- 3Fe(s) + 4H2O(g)\n\nMany oxidation reactions cannot reverse.  For example, burning charcoal on the BBQ will produce ash, CO, CO2 and heat.  However, you cannot use CO2 and ash to make charcoal.  This example is irreversable from a thermodyamic point of view.  Heat is generated from the reaction, yet heat cannot be used to go in the other direction.\n\nReversable thermodynamic processes usually involve a change of state.  You can add heat to change ice to water or water to steam.  Take heat away and you change water to ice.
24818
Thier all chemical reactions.
413924
They are endothermic reactions and need energy for the forward reaction to take place.
731401
Correct.\nD. when delta G is positive the reaction is non-spontaneous
1175170
A chemical reaction is material changing from a beginning mass to a resulting substance. The hallmark of a chemical reaction is that new material or materials are made, along with the disappearance of the mass that changed to make the new. This does not mean that new elements have been made. In order to make new elements, the nuclear contents must change. There are magnitudes of difference in the amounts of energy in ordinary chemical reactions compared to nuclear reactions, the rearrangement of the nuclei of atoms to change to new elements is enormous compared to the smaller energies of chemical changes. The alchemists, in their efforts to change less expensive metals to gold, did not have the fundamental understanding of what they were attempting to do to appreciate the difference. \n\nA chemical equation is a way to describe what goes on in a chemical reaction, the actual change in a material. Chemical equations are written with the symbols of materials to include elements, ionic or covalent compounds, aqueous solutions, ions, or particles. There is an arrow pointing to the right that indicates the action of the reaction. The materials to the left of the arrow are the reactants, or materials that are going to react. The materials to the right of the arrow are the products, or materials that have been produced by the reaction. The Law of Conservation of Mass states that in a chemical reaction no mass is lost or gained. The Law of Conservation of Mass applies to individual types of atom. One could say that for any element, there is no loss or gain of that element in a chemical reaction. There are such things as reversible reactions, reactions in which the products reassemble to become the original products. Reversible reactions are symbolized in chemical equations by a double-headed arrow, but the standard remains to call the materials on the left the reactants and the materials on the right the products.
744754
In a reversible reaction, the products can be the reactants and the reactants can be the products and the whole thing goes the other way around, sort of like an 'undo'. Many reactions are at least partly reversible, and they establish an equilibrium where nothing seems to be happening because at the same time one is going the opposite is. A nonreversible reaction only goes one way or goes in one way to such a high percent it is virtually nonreversible.
469693
Nothing. The two reactants have the same anion, so no reaction will take place. If you create a hypothetical double displacement reaction, you get:\n\nFeS + CS2 --> FeS + CS2\n\nAnd, so, there is no reaction.
988889
understanding the reaction meachanism \neffect of catalysts etc....\ndetermining the amounts needed
625286
Cu is more active than Silver or to put it in more technical terms, its reduction potential is higher. Thus this particular reaction is spontaneous i.e. happens on its own. \n\nThe reverse is also possible but only if you supply the energy required which is usually in the form of electricity.
287531
They act as a catalyst which sppeds up the reaction
877634
Any acid, for example:\n\nHCl + H2O  --> Cl- + H3O+
1123465
Na2S + 2 HCl > H2S + 2 NaCl  \n\nH2SO4 + BaOH > H20 + BaSO4  \n\nNH4Cl + NaOH > NaCl + NH4OH\n\nAgNO3 + NaCl > AgCl + NaNO3\n\nnot sure about complete or reversible..:)
535845
A solute cannot undergo reversible oxidation/reduction if it diffuses away from the electrode. The diffusion coefficient simply measures how quickly this diffusion happens. \n\nWhen deciding how reversible a particular redox reaction is by CV, you have to consider both the intrinsic reactive properties of the species in solution as well as how much material is lost to analysis as it diffuses away from your electrode.
290614
chemical reaction\n\nall substance give off some heat during change\n\nlook up kinetics on the web
732299
The sign there is a chemical reaction is the fact there is heat being released.  Evidently, the reactant have more energy, because they are able to release that energy in the form of heat.