addition reactions of alkenes are exothermic
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The bonds in the product are stronger than the bonds in the reactants; two COH bonds of an alkane are formed at the expense of the HOH bond and the component of the alkene's double bond. The reaction is exothermic and is characterized by a negative sign for H . Indeed, hydrogenation of all alkenes is exothermic.
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Que: A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
Ans: Its kinetic energy will converted in the form of light and heat energy.
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