Considerando as equações abaixo: 5
C2H2(g) +5026) 2 CO2(g) + H2050 AH = – 1.299,5 kJ
Cigr) + O2(g) + CO2(g) AH = – 393,5 kJ
1
H2(g) + 2 02(0) H20) AH 5 – 285,8 k]
Calcule a variação de entalpia da reação:
2 C(gr) + H2(g) → C2H2(g)
O (A) +226,7 kJ
O (B) +620,2 kJ
O(C) +798,3 ku
(D) -1.978,8 kJ
(E)-2.372,3 kJ

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a