Waa maxay sababta xamaasadda samaynta curiyayaasha eber?
Waa maxay sababta xamaasadda samaynta curiyayaasha eber?
Anonim

The enthalpy of formation ah curiye xaaladdeeda aasaasiga ah had iyo jeer waxay ahaan doontaa 0 sababtoo ah wax tamar ah uma baahna in la sameeyo iskudhis si dabiici ah u dhacaya. Marka walax sameeyay laga bilaabo qaabka ugu xasilloon ee ay curiyayaasha, isbedel ku yimid xamaasad leh dhacaya.

Sidoo kale waxaa la is weydiin karaa, waa maxay maaddooyinka xamaasadda leh ee samaynta eber?

Dhammaan walxaha ku jira goboladooda caadiga ah (gaaska oksijiinta, adag kaarboon qaab ahaan garaafka, iwm) waxay leeyihiin halbeegga enthalpy ee samaynta eber, maadaama aysan jirin wax isbeddel ah oo ku lug leh samayntooda.

Intaa ka dib, su'aashu waxay tahay, waa maxay xamaasadda samaynta biyaha? ATcT enthalpy ee la doortay oo ku salaysan nooca 1.118 ee Shabakadda Thermochemical

Magaca Noocyada Formula fH°(298.15 K)
Biyo H2O (cr, eq.press.) -292.740

Taas oo la mid ah, waa maxay sababta enthalpy-ga caadiga ah ee samaynta dheemanka aanu eber ahayn inkasta oo uu yahay curiye?

The enthalpy caadiga ah ee samaynta ah curiye in ay heerka gobolku waa EBER!!!! Marka, ΔH ° f ee C (s, graphite) waa eber, laakiin ΔH ° f ee C (s, dheeman) waa 2 kJ/mol. Taasi waa sababta oo ah graphite waa kan heerka xaaladda kaarboonka, ma aha dheeman.

Maxaa loola jeedaa marka Delta h eber yahay?

Waxay cabbiri karaan oo keliya isbeddellada enthalpy. Marka enthalpy waa togan iyo delta H ayaa ka weyn eber, tan macneheedu waa in nidaam uu nuugo kulaylka. Tan waxa loo yaqaan falcelinta endothermic. Marka enthalpy waa taban iyo delta H way ka yar tahay eber, tan macneheedu waa in nidaam soo daayay kulayl. Tan waxa loo yaqaan falcelinta kacsiga.

Mawduuca caan ku ah