Question

Determinati variatia de entalipie in reactia de hidrogenare partiala a unui mol de propina, daca se cunosc variatiile de entalpie in urmatoarele reactii de hidrogenare:
CH3-CH=CH2(g) + H2(g) -> CH3-CH2-CH3(g) ^H1 = -124.3 kJ
CH3-C(leg tripla)CH(g) + 2H2(g) ->CH3-CH2-CH3 ^H2 = -288,9 kJ

Answer 1

ecuatia reactiei cerute este" 
 rr3:  CH≡C-CH3 + H2----> CH2=CH-CH3  
ea se obtine prin operatia algebrica : r3=r2 -r1
deci  ΔH3= ΔH2-ΔH1=......................................CALCULEAZA !!!!