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One chemical method involves the decomposition of triethylsilyl hydrotrioxide generated in situ from triethylsilane and ozone. [21] (C 2 H 5) 3 SiH + O 3 → (C 2 H 5) 3 SiOOOH → (C 2 H 5) 3 SiOH + O 2 (1 Δ g) Another method uses a reaction of hydrogen peroxide with sodium hypochlorite in aqueous solution: [19] H 2 O 2 + NaOCl → O 2 (1 Δ ...
The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, producing large amounts of energy (ATP). Respiration is one of the key ways a cell releases chemical energy to fuel cellular activity. The overall reaction occurs in a series of biochemical steps, some of which are redox reactions.
The reaction for the aerobic respiration is essentially the reverse of photosynthesis, except that now there is a large release of chemical energy which is stored in ATP molecules (up to 38 ATP molecules are formed from one molecule of glucose and 6 O 2 molecules). The simplified version of this reaction is: C 6 H 12 O 6 + 6 O 2 → 6 CO 2 + 6 ...
Rather than combustion, organisms rely on elaborate sequences of electron-transfer reactions, often coupled to proton transfer. The direct reaction of O 2 with fuel is precluded by the oxygen reduction reaction, which produces water and adenosine triphosphate. Cytochrome c oxidase affects the oxygen reduction reaction by binding O 2 in a heme ...
When a plant recognizes an attacking pathogen, one of the first induced reactions is to rapidly produce superoxide (O − 2) or hydrogen peroxide (H 2 O 2) to strengthen the cell wall. This prevents the spread of the pathogen to other parts of the plant, essentially forming a net around the pathogen to restrict movement and reproduction.
However, the total cell potential (difference between oxidation and reduction half cell potentials) will remain 1.23 V. This potential can be related to Gibbs free energy (ΔG) by: ΔG°cell = −nFE°cell Where n is the number of electrons per mole products and F is the Faraday constant. Therefore, it takes 475 kJ of energy to make one mole of ...
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[35] [b] The highest-energy, partially filled orbitals are antibonding, and so their filling weakens the bond order from three to two. Because of its unpaired electrons, triplet oxygen reacts only slowly with most organic molecules, which have paired electron spins; this prevents spontaneous combustion. [36]