Ib qho tshuaj tiv thaiv exothermic yog "tawm tsam uas tag nrho cov qauv enthalpy hloov ΔH⚬ yog qhov tsis zoo." Exothermic cov tshuaj tiv thaiv feem ntau tso cov cua sov thiab ua rau hloov cov ntawv cog lus tsis muaj zog nrog cov muaj zog dua. … Feem ntau ntawm cov tshuaj tiv thaiv zoo heev uas tau pom hauv chav kawm yog exothermic thiab exergonic.
Ib qho piv txwv ntawm cov tshuaj tiv thaiv exothermic yog dab tsi?
txhuam koj cov hniav, ntxuav koj cov plaub hau, thiab teeb koj lub qhov cub yog txhua yam piv txwv ntawm kev tawm tsam sab nraud. Nyeem ntawv kom paub txog kev sib txuas, nruab nrab, kev txhim kho corrosion, thiab dej-raws li exothermic tshua.
Dab tsi yog 5 piv txwv ntawm cov tshuaj tiv thaiv exothermic?
Ntawm no yog qee qhov piv txwv ntawm cov tshuaj tiv thaiv exothermic:
- Kev ua ib lub thawv dej khov. Ua cov dej khov nab kuab yog txheej txheem ntawm cov kua hloov nws lub xeev mus rau cov khoom. …
- daus tsim hauv huab. …
- Kub tswm ciab. …
- Xov tooj cua. …
- Kub qab zib. …
- Tsim cov ion khub. …
- Reaction ntawm Cov kua qaub thiab dej. …
- Dej thiab calcium chloride.
Yuav ua li cas cov tshuaj tiv thaiv tag nrho exothermic?
Summary
- Ib qho tshuaj tiv thaiv exothermic yog tshuaj lom neeg cov tshuaj tiv thaiv uas xav tau lub zog tsawg dua los rhuav cov ntawv cog lus hauv cov reactants dua li tso tawm thaum cov ntawv cog lus tshiab hauv cov khoom.
- Thaum muaj kev tawm tsam sab nraud, lub zog raug muab tawm tas li, feem ntau nyob rau hauv daim ntawv ntawm tshav kub.
- Txhua yam kev kub ntxhovCov tshuaj tiv thaiv yog cov tshuaj tiv thaiv exothermic.
Yuav ua li cas yog cov cim qhia ntawm exothermic tshuaj tiv thaiv?
Cov tshuaj tiv thaiv kab mob sib kis tuaj yeem tshwm sim sai thiab ua rau muaj kev pheej hmoo siab dua lossis entropy (ΔS > 0) ntawm lub kaw lus. Lawv raug qhia los ntawm qhov tsis zoo ntawm cov cua sov (kub poob rau ib puag ncig) thiab txo qis hauv enthalpy (ΔH < 0). Hauv chav kuaj, cov tshuaj tiv thaiv exothermic ua kom sov lossis tuaj yeem tawg.
