What amount of heat energy kJ is released in the combustion of 12-0 g of C3H4- C3H4g-4 O2g-3 CO2g-2 H2Ol - H-1939-1 kJ-Atomic weights- C - 12-01- H - 1-008- O- 16-00-

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Enthalpy of Combustion

What amount o...

Question

What amount of heat energy (kJ) is released in the combustion of 12.0 g of $C_{3} H_{4}$ ?
$C_{3} H_{4} (g) + 4 O_{2} (g) \to 3 C O_{2} (g) + 2 H_{2} O (l)$ $Δ H^{\circ} = - 1939.1 k J$
[Atomic weights: C = 12.01, H = 1.008, O= 16.00]

725

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504

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783

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581

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C = 12.01, H = 1.008, O = 16.00

C_{57} H_{104} O_{6} (s) + 80 O_{2} (g) ⟶ 57 C O_{2} (g) + 52 H_{2} O (I)

Δ H C_{57} H_{107} O_{6} = - 70870 k J / m o l e

Δ H H_{2} O (I) = - 285.8 k J / m o l e

Δ H C O_{2} (g) = - 393.5 k J / m o l e

3.00 g

N H_{3 (g)}

N = 14.00, H = 1.008

4 N H_{3} (g) + 5 O_{2} (g) ⟶ 4 N O (g) + 6 H_{2} O (g)

Δ H N H_{3} (g) = - 46.1 k J / m o l e

Δ H N O (g) = + 90.2 k J / m o l e

Δ H H_{2} O (g) = - 241.8 k J / m o l e

C_{6} H_{12} O_{6} (s) + 6 O_{2} (g) \to 6 C O_{2} (g) + 6 H_{2} O (l); Δ H = - 2900 k J

C_{6} H_{6} (l) + 7 \frac{1}{2} O_{2} (g) \to 3 H_{2} O (l) + 6 C O_{2} (g), Δ H = - 781.0 K c a l m o l^{- 1}

156 g o f C_{6} H_{6}

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