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Alcohols as Nucleophiles and Electrophiles

If the heat o...

Question

If the heat of formation of NO 2 is 'x' [1/2N 2(g) +O 2(g) →NO 2(g) ] the heat of reaction N 2(g) +O 2(g) →2NO (g) is y and the heat of reaction 2NO (g) +O 2(g) →2NO 2 (g) is z, then:

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_{(g)}

_{2 (g)}

\to

_{2 (g)}

[N O]^{2}

[O_{2}

^{1}

^{r d}

O_{(g)} + e^{-} \to O_{(g)}^{-} Δ H_{1}

O_{(g)}^{-} + e^{-} \to O_{(g)}^{- 2} Δ H_{2}

O_{2 (g)} \to O_{2 (g)}^{+} + e^{-} Δ H_{3}

O_{(g)} \to O_{(g)}^{+} + e^{-} Δ H_{4}

H_{2 (g)} \to H_{2 (g)}^{+} + e^{-} Δ H_{5}

H_{(g)} \to H_{(g)}^{+} + e^{-} Δ H_{6}

O_{(g)} + 2 e^{-} \to O^{- 2} Δ H_{7}

N_{2} O_{5}

(i) N_{2} O_{5} (g) \to 2 N O_{2} (g) + \frac{1}{2} O_{2} (g); \frac{- d [N_{2} O_{5}]}{d t} = k [N_{2} O_{5}] (i i) 2 N_{2} O_{5} (g) \to 4 N O_{2} (g) + O_{2} (g); \frac{- d [N_{2} O_{5}]}{d t} = k^{'} [N_{2} O_{5}]

H_{2 (g)} + B r_{2 (l)} \to 2 H B r_{(g)} C_{(d i a m o n d)} + 2 H_{2 (g)} \to C H_{4 (g)} C_{(g r a p h i t e, s)} + 2 H_{2} (g) + \frac{1}{2} O_{2} (l) \to C H_{3} O H (l) H_{2 (g)} + \frac{1}{2} O_{2 (g)} \to H_{2} O_{(l)} C_{(g r a p h i t e, s)} + 3 H_{2} (g) + \frac{1}{2} O_{2} (l) \to C_{2} H_{5} O H (l) \frac{1}{2} N_{2 (g)} + \frac{3}{2} H_{2 (g)} \to N H_{3 (g)} C_{(g r a p h i t e . s)} + O_{2 (g)} \to C O_{2 (g)} C_{(d i a m o n d)} + \frac{1}{2} O_{2 (g)} \to C O (g)

{N o}_{2}

[\frac{1}{2} N_{2 (g)} + O_{2 (g)} \to {N O}_{2 (g)}]

N_{2 (g)} + O_{2 (g)} \to 2 {N O}_{(g)}

y

2 {N O}_{(g)} + O_{2 (g)} \to 2 {N O}_{2 (g)}

z

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If the heat of formation of NO 2 ​ is 'x' [1/2N 2(g) ​ +O 2(g) ​ →NO 2(g) ​ ] the heat of reaction N 2(g) ​ +O 2(g) ​ →2NO (g) ​ is y and the heat of reaction 2NO (g) ​ +O 2(g) ​ →2NO 2 ​ (g) ​ is z, then: