A reaction in which ad-ditional atoms or groups of atoms are intro-duced into an unsaturated organic compound,such as an alkene or ketone. A simple exam-ple is the addition of bromine across the dou-ble bond in ethene :H2C=CH2+Br2→BrH2CCH2BrAddition react...[继续阅读]

    See coordinate bond.参阅152页coordinate bond。...[继续阅读]

    A change during whichno heat enters or leaves the system.In an adiabatic expansion of a gas,me-chanical work is done by the gas as its vol-ume (V) increases,its pressure (p) decreas-es,and its temperature (T) falls. For an ide-al gas undergoing a reversib...[继续阅读]

    A substance that is adsorbed ona surface.See adsorption被吸附在表面上的物质。参阅12页adsorption。...[继续阅读]

    The substance on whose surfaceadsorption takes place.See adsorption表面发生吸附作用的物质。参阅12页adsorption。...[继续阅读]

    A process in which a layer ofatoms or molecules of one substance forms onthe surface of a solid or liquid. All solid sur-faces take up layers of gas from the surround-ing atmosphere. The adsorbed layer may beheld by chemical bonds (chemisorption) orby wea...[继续阅读]

    See absorption indi-cator.参阅2页absorption indicator。...[继续阅读]

    See sol参阅545页sol。...[继续阅读]

    See atomic emission spectroscopy参阅46页atomicemission spectroscopy。...[继续阅读]

    The extent to which one substanceis attracted to or reacts with another. 物质易被另一物质吸引或与其发生反应的程度。...[继续阅读]