As far as I understand it, the final product … On Earth it's most likely a nuclear fission of light elements, like the one occurring in early "dry" thermonuclear bombs, or a fission processes preceding D-T fusion reaction: $$\ce{^7_3Li + ^1_0n -> ^3_1H + ^4_2He + ^1_0n - \pu{2.467 MeV}}$$. Similarly, the formation of chemical bonds requires an input of energy. Want to improve this question? Special thanks to David Richerby for correcting me! Basically every decomposition reaction is an endothermic reaction, right? My problem is that with part c), I can't figure out if the reaction as a whole is exothermic or endothermic; the only data they've given me is that the entropy of activation is +20 Jmol-1K-1 and that the solvent isotope effect value is KH/KD = 0.33. Explanation: The answer is produces energy, more than, and always greater than Can ya'll subscribe to my brother's channel "Loocy Lace", It will really help him and I want to surprise him for his B-day tomorrow, my fellow Brainliens? In this experiment, various reactions are examined. the difference between a Physical change and a Chemical change. It only takes a minute to sign up. The energy level increases in an endothermic. Whether a reaction is endothermic or exothermic depends on the direction that it is going; some reactions are reversible, and when you revert the products back to reactants, the change in enthalpy is … Ergo, most natural reactions are spontaneous and exothermic, while most artificial reactions are endothermic. The answer by avt is incorrect, Endothermic (heat absorbing) reactions can occur spontaneously but require higher temperatures. Exothermic reactions may be written as chemical reactions. The Q-value of the reaction is defined as the difference between the sum of the masses of the initial reactants and the sum of the masses of the final products, in energy units (usually in MeV).. Is it kidnapping if I steal a car that happens to have a baby in it? Most endothermic reactions are non-spontaneous; without a steady supply of energy, the reactions typically come to a stop. Glycerol reacting with fatty acids to make lipids. #6 . There is an endothermic nuclear fusion for the elements heavier than iron. 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