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One simple example of the coupling of reaction is the decomposition of calcium carbonate: \[CaCO_{3(s)} \rightleftharpoons CaO_{(s)} + CO_{2(g)} \;\;\;\;\;\;\; \Delta G^o = 130.40 \;kJ/mol \label{1}\] The strongly positive \(\Delta G\) for this reaction is reactant-favored. If the temperature is raised above 837 ºC, this reaction becomes ...
This YouTube video explains coupled reactions and their applications in thermodynamics.
Paul Andersen explains the importance role of coupled reactions in biology. He starts by explaining how the power of a river can be harnessed by a water mil...
In summary: You can use the stoichiometric coefficients in calculating the powers in equilibrium constants because real reactions have a mechanism involving one or more coupled elementary steps, and the order of reaction is based on the stoichiometric coefficient of the elementary step.
13 cze 2023 · Thermodynamically favored reactions are typically associated with the release of energy from and the breakdown of various forms of food (known generically as catabolism), while reactions that build up biomolecules (known generically as anabolism) are typically thermodynamically unfavorable.
8 cze 2023 · CO + 1/2 O 2 → CO 2 (ΔG° = -283.5 kJ) We can use coupled reaction to solve this problem because the two reactions have a common intermediate of O 2. However, we first want to multiply the bottom reaction by three to make the O 2 s cancel out. When we do so, we also multiply ΔG° by the same factor.
A reaction where the the free energy of a thermodynamically favorable transformation, such as the hydrolysis of ATP, and a thermodynamically unfavorable one, are mechanistically joined into a new reaction (or may be envisaged to be so joined) is known as a coupled reaction.
