Chemistry Dictionary & Glossary: Terms Starting with H HABER PROCESSHALF-CELLHALF-LIFEHALF-REACTIONHALF-WAVE PLATEHALOGENSHANSCH ANALYSISHAPTENHARD DRUGHARD WATERHAZARDOUS MATERIAL (HAZMAT)HDPE (HIGH DENSITY POLYETHYLENE)HEATHEAT CAPACITYHEAT OF CONDENSATIONHEAT OF CRYSTALLIZATIONHEAT OF FUSIONHEAT OF SOLUTIONHEAT OF VAPORIZATIONHEAVY WATERHEISENBERG'S UNCERTAINTY PRINCIPLEHELIUMHELMHOLTZ COILHENRY'S LAWHESS' LAW OF HEAT SUMMATIONHETEROCYCLIC AMINEHETEROGENEOUSHETEROGENEOUS CATALYSISHETEROGENEOUS CATALYSTHETEROGENEOUS EQUILIBRIAHETEROGENEOUS MIXTUREHETERONUCLEARHETERORECEPTORHEXAPOLE SELECTIONHFCCHIGH SPIN COMPLEXHOHLRAUMHOMCORHOMOGENEOUSHOMOGENEOUS CATALYSTHOMOGENEOUS EQUILIBRIAHOMOGENEOUS MIXTUREHOMOLOGOUS SERIESHOMOLOGUEHOMONUCLEARHOMOTOPICHORMONEHOT MIRRORHUND'S RULEHWOTHYALURONIC ACIDHYBRIDIZATIONHYDRATEHYDRATE ISOMERSHYDRATIONHYDRATION ENERGYHYDRIDEHYDROBROMIC ACIDHYDROCARBONHYDROCARBONSHYDRODYNAMICSHYDROGENHYDROGEN BONDHYDROGEN-OXYGEN FUEL CELLHYDROGENATIONHYDROLYSISHYDROLYSIS CONSTANTHYDROMETERHYDROPHILIC COLLOIDSHYDROPHILICITYHYDROPHOBICITYHYDROXYLHYPERCHROMIC EFFECTHYPERFINE STRUCTUREHYPERPOLARIZABILITYHYPOCHROMIC EFFECTHYPSOCHROMIC SHIFTHYSTERESISHYUGEN'S PRINCIPLE