Aluminum chloride can be formed from its elements: (i) 2Al(s)+3Cl2(g)⟶2AlCl3(s) ΔH°= ?

Use the reactions here to determine the ΔH° for reaction (i):

(ii) HCl(g)⟶HCl(aq) ΔH∘(ii)=−74.8kJ

(iii) H2(g)+Cl2(g)⟶2HCl(g) ΔH∘(iii)=−185kJ

(iv) AlCl3(aq)⟶AlCl3(s) ΔH∘(iv)=+323kJ

(v) 2Al(s)+6HCl(aq)⟶2AlCl3(aq)+3H2(g) ΔH∘(v)=−1049kJ

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.