Video: Q hauv Q MC yog dab tsi? T?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Q = mc∆T . Q = tshav kub zog (Joules, J) m = loj ntawm ib yam khoom (kg) c = tshwj xeeb kub (units J / kg∙K) ∆ yog lub cim txhais tias "kev hloov hauv"
Hais txog qhov no, C hauv Q MC Delta txhais li cas?
tshwj xeeb kub
Tsis tas li ntawd, qhov tsis zoo Q txhais li cas? Re: Negative q A nev q qhia tau hais tias cov tshuaj tiv thaiv yog exothermic thiab lub tshav kub raug tso tawm nrog cov tshuaj tiv thaiv.
Xav txog qhov no, koj ua li cas xam Q hauv thermodynamics?
Txij li thaum lub kaw lus muaj qhov ntim tas li (ΔV = 0) lub sij hawm -PΔV = 0 thiab kev ua haujlwm yog sib npaug rau xoom. Yog li ntawd, nyob rau hauv lub kev sib npaug ΔU = q +w w = 0 and ΔU = q . Lub zog sab hauv yog sib npaug rau cov cua sov ntawm qhov system.
Taw qhia.
| Txheej txheem | Kev ntsuas kub (q) | Kos npe ua haujlwm (w) |
|---|---|---|
| Thaum tshav kub kub tso tawm los ntawm lub system- exothermic (absorbed los ntawm ib puag ncig) | - | N/A |
Q AJ or kJ?
Koj xav tau koj q nyob rau hauv cov units Joules los yog kJ ua . Yog tias koj siv lub q = mC(delta T) nrog koj muab C, koj q yuav nyob rau hauv units ntawm (gram) ( kJ ua ). Hauv qhov teeb meem, koj tau muab lub peev xwm kub, tsis yog lub peev xwm tshwj xeeb. Yog li ntawd, koj tsis tas yuav loj los xam q.
Pom zoo:
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