Answer to Question #90137 in Organic Chemistry for Brandy

Question

The combustion of coal with oxygen forms CO2 and releases 94 kcal of energy.
C(s) + O2(g) -> CO2(g) (Symbol➡️) AH = -94 kcal of energy

How much energy is released when 8.3 mol of C reacts? Kcal of energy released

Answer 1

C(s) + O₂(g) = CO₂(g);  ∆H₁ = -94 kcal

  1 mol C – 94 kcal

8.3 mol C – X kcal

Q = X = 94 kcal × 8.3 mol / 1 mol = 780.2 kcal.

∆H₂ = -780.2 kcal.