Yuav ua li cas koj xam lub zog cua sov los ntawm dej?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Xam Xaj Kub Tso tawm

Tom ntej no, koj siv Q = mc ∆T, i.e. Q = (100 + 100) x4.18 x 8. Faib qhov tshwj xeeb Thaum tshav kub kub muaj peev xwm ntawm dej , 4181 joules / kg degrees Celsius los ntawm 1000 kom tau cov duab rau joules / g degrees C. Cov lus teb yog 6, 688, uas txhais tau tias 6688 joules ntawm kub tso tawm.

Hauv qhov no, dab tsi yog lub zog xav tau los ua kom sov dej?

Qhov tshwj xeeb kub sawv cev tus nqi ntawm zog xav tau nce 1 kg ntawm cov khoom los ntawm 1^oC (los yog 1 K), thiab tuaj yeem xav tias muaj peev xwm nqus tau kub . SI units ntawm cov cua sov tshwj xeeb yog J / kgK (kJ / kg^oC). Dej muaj qhov tshwj xeeb loj kub 4.19 kJ/kg^oC piv rau ntau lwm cov kua thiab cov khoom siv.

Kuj Paub, koj ua li cas xam cov cua sov ntawm kev daws? Enthalpy of Solution (Huab cua sov ntawm kev daws) Piv txwv

1. Xam cov cua sov tso tawm, q, hauv joules (J), los ntawm cov tshuaj tiv thaiv: q = huab hwm coj (dej) × cov peev txheej kub (dej) × hloov pauv hauv qhov kub thiab txias (kev daws teeb meem)
2. Xam cov moles ntawm solute (NaOH_(s)): moles = mass ÷molar mass.
3. Xam qhov hloov pauv enthalpy, ΔH, hauv kJmol^-1 ntawm solute:

Raws li, cov dej kub puas muaj zog?

Dej kub ib txwm muaj ntau zog dua li txias dej , txawm los ntawm molecule los yog ntim. Koj yuav muaj nce nws qhov kub thiab txias los ntawm kev coj nws tomelting point (xav tias tsim nyog siab), yog li muab nws thermal zog qhov twg yog qhov tshwj xeeb kub muaj peev xwm ofice, thiab.

Dab tsi yog qhov txhais ntawm lub peev xwm kub?

Thaum tshav kub kub muaj peev xwm los yog thermal muaj peev xwm yog aphysical khoom ntawm teeb meem, txhais raws li tus nqi ntawm kub yuav tsum tau muab rau ib tug muab huab hwm coj ntawm ib yam khoom los producea unit hloov nyob rau hauv nws kub.