Thawj qhov kub ntawm cov dej kub yog dab tsi?
Thawj qhov kub ntawm cov dej kub yog dab tsi?

Video: Thawj qhov kub ntawm cov dej kub yog dab tsi?

Video: Thawj qhov kub ntawm cov dej kub yog dab tsi?
Video: Dab ntxwg nyoos yog leej twg ...zaj no zoo heev. 2024, Kaum ib hlis
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Teb: Thawj qhov kub dej kub 69 ° C , …

Raws li qhov tshwm sim, qhov kub ntawm qhov pib ntawm dej yog dab tsi?

° C . Thawj qhov kub ntawm dej = 20 ° C C . Qhov ntsuas kub kawg ntawm cov dej yog nws cov boiling point, uas yog sib npaug rau 100 ° C.

Ib yam li ntawd, qhov ntsuas kub pib txhais li cas? Cov pib mob kub muaj ib yam lub ntsiab lus raws li rau tej thermal tsom xam los ntawm txhais cov pib lub xeev ntawm tus qauv thaum pib ntawm kev xam thiab yog tsuas yog siv rau lub thermal ib feem ntawm chained thermo-mechanical xam.

Ib sab saum toj no, tus qauv rau thawj qhov kub thiab txias yog dab tsi?

Q = mc(T - t0) Yog li no rewritten daim ntawv ntawm lub kev sib npaug ua kom yooj yim nrhiav pib kub . Koj tuaj yeem ntsaws rau tag nrho lwm cov txiaj ntsig uas koj tau muab, tom qab ntawd daws rau t0. Piv txwv li: Hais koj ntxiv 75.0 Joules ntawm lub zog rau 2.0 grams dej, tsa nws kub rau 87 ° C.

Q MC _firxam_#8710 yog dab tsi; T siv rau?

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"

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