1)(PUC-MG) Sejam dadas as equações termoquímicas, todas a 25 °C e 1 atm. I- H2(g) + 1/2O2(g) →H₂O AH = -68,3 Kcal/mol
II- 2Fe()+ 3/2 O2(g) Fe₂O3(s) AH = -196,5 Kcal/mol
III- 2Al(s) + 3/2 O2(g) Al2O3(s) AH = -399,1 Kcal/mol
IV-C(grafite) + O2(g) → CO2(g) AH = -94,0 Kcal/mol
V- CH4(g) + O2(g) →→ CO2(g) + H₂O AH = -17,9 Kcal/mol Exclusivamente sob o ponto de vista energético, das reações acima, a que você escolheria como fonte de energia é:
A)I
B)II
C)III
D)IV
E)V

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.