Video: Dab tsi yog qhov txawv ntawm daim ntawv cog lus lub zog thiab daim ntawv cog lus dissociation zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub ntsiab qhov sib txawv ntawm daim ntawv cog lus zog thiab bonddissociation zog yog tias bond zog yog qhov nruab nrab ntawm zog yuav tsum tau rhuav tshem tag nrho cov daim ntawv cog lus tib ob hom atoms hauv a compound whereas bond dissociation zog yog tus nqi ntawm zog yuav tsum tau rhuav tshem ib qho tshwj xeeb daim ntawv cog lus inhomolysis.
Ntawm no, puas yog daim ntawv cog lus lub zog tib yam li lub zog sib cais?
Tsuas yog diatomic molecules, lub daim ntawv cog lus - dissociation zog txawv ntawm cov bondenergy . Thaum lub daim ntawv cog lus - dissociation zog yog cov zog ntawm ib qho tshuaj daim ntawv cog lus , cov bondenergy yog qhov nruab nrab ntawm tag nrho cov daim ntawv cog lus - kev tsis sib haum xeeb ntawm daim ntawv cog lus ntawm ib yam hom rau agven molecule.
Tsis tas li ntawd, dab tsi yog qhov kev sib raug zoo ntawm daim ntawv cog lus thiab daim ntawv cog lus dissociation zog? Qhov siab dua daim ntawv cog lus , lub zog rub nruab nrab ob lub atom thiab luv luv daim ntawv cog lus ntev. Cov bond zog ( bond dissociation zog ) yog kev ntsuas ntawm tus nqi ntawm zog xav tau los rhuav tshem ib qho ntawm covalently bonded gaseous atoms.
Tsuas yog li ntawd, qhov txawv ntawm daim ntawv cog lus enthalpy thiab daim ntawv cog lus zog yog dab tsi?
Feem ntau, kev hloov pauv zoo hauv enthalpy yuav tsum tau tawg a daim ntawv cog lus , thaum ib tug tsis zoo hloov nyob rau hauv enthalpy yog nrog los ntawm kev tsim ntawm a daim ntawv cog lus . Ua lwm yam lus, tawg a daim ntawv cog lus yog cov txheej txheem endothermic, thaum tsim ntawm daim ntawv cog lus yog exothermic.
Lub zog sib txuas nrog piv txwv yog dab tsi?
Hauv chemistry, daim ntawv cog lus zog (E) lub daim ntawv cog lus enthalpy (H) yog qhov ntsuas ntawm daim ntawv cog lus lub zog hauv tshuaj daim ntawv cog lus . Rau piv txwv , carbon-hydrogen bondenergy Hauv methane H (C-H) yog qhov hloov pauv enthalpy cuam tshuam nrog kev rhuav tshem ib lub molecule ntawm methane rau hauv cov pa roj carbon atom thiab plaub hydrogen radicals, muab faib los ntawm 4.
Pom zoo:
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