Video: Puas yog HCl NaOH exothermic?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov tshuaj tiv thaiv no tau muab cais ua ib qho exothermic tshuaj tiv thaiv. Cov tshuaj tiv thaiv ntawm HCl (aq), muaj zog acid, nrog NaOH (aq), lub hauv paus muaj zog, yog ib qho exothermic tshuaj tiv thaiv.
Tom qab ntawd, vim li cas HCl thiab NaOH exothermic?
- Thaum cov tshuaj tiv thaiv endothermic - Bonds tau tawg thiab lub zog yog absorbed los ntawm ib puag ncig. Hauv koj qhov piv txwv ntawm HCl + NaOH - qhov no yog ib qho tshuaj tiv thaiv neutralization rau daim ntawv NaCl + H20. Yeej muaj ntau daim ntawv cog lus ntau dua li kev sib tsoo hauv cov tshuaj tiv thaiv no yog li Delta H yog qhov tsis zoo - nws yog ntau dua exothermic.
Dab tsi yog qhov enthalpy ntawm neutralization ntawm HCl thiab NaOH? Yog li cov enthalpy ntawm neutralization ntawm HCl thiab NaOH yuav luag tib yam li cov enthalpy ntawm neutralization ntawm H + thiab OH- ions i.e-57.3 KJ ib mole.).
Kuj tseem yuav paub, qhov tshuaj tiv thaiv ntawm HCl thiab NaOH yog dab tsi?
Hydrochloric acid reacts nrog sodium hydroxide los tsim sodium chloride (cov ntsev) thiab dej. Sodium chloride yog tsim los ntawm Na + cations los ntawm lub hauv paus ( NaOH thiab Cl- anions los ntawm cov kua qaub ( HCl ). HCl + NaOH → H2O + NaCl. Hydrogen bromide reacts nrog poov tshuaj hydroxide los tsim poov tshuaj bromide (cov ntsev) thiab dej.
Yuav ua li cas koj xam qhov enthalpy hloov ntawm HCl thiab NaOH?
xam tus naj npawb ntawm moles ntawm lub hauv paus koj ntxiv los txiav txim siab molar tshav kub ntawm neutralization, qhia siv lub kev sib npaug ΔH = Q ÷ n, qhov "n" yog tus lej ntawm moles. Rau piv txwv Piv txwv li, koj ntxiv 25 mL ntawm 1.0 M NaOH rau koj HCl los tsim lub tshav kub ntawm neutralization ntawm 447.78 Joules.
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