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...[繼續(xù)閱讀]

    See coordinate bond.參閱152頁coordinate bond。...[繼續(xù)閱讀]

    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...[繼續(xù)閱讀]

    A substance that is adsorbed ona surface.See adsorption被吸附在表面上的物質(zhì)。參閱12頁adsorption。...[繼續(xù)閱讀]

    The substance on whose surfaceadsorption takes place.See adsorption表面發(fā)生吸附作用的物質(zhì)。參閱12頁adsorption。...[繼續(xù)閱讀]

    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...[繼續(xù)閱讀]

    See absorption indi-cator.參閱2頁absorption indicator。...[繼續(xù)閱讀]

    See sol參閱545頁sol。...[繼續(xù)閱讀]

    See atomic emission spectroscopy參閱46頁atomicemission spectroscopy。...[繼續(xù)閱讀]

    The extent to which one substanceis attracted to or reacts with another. 物質(zhì)易被另一物質(zhì)吸引或與其發(fā)生反應(yīng)的程度。...[繼續(xù)閱讀]