The energy of combustion of propane C3H8 gas in terms of given data is-Bond energy kJ-mol-C-H -O - O -C - O -O-H -C-C -x1 -x2 -x3 -x4 -x5 Resonance energy of CO2 is - z kJ-mol and Hvaporization-H2O- is y kJ-mol

C_3H_8 (g) + 5O_2 (g) → 3CO_2 (g) + 4H_2O (l) CH = [8 × B.E. (C H) + 2 × B.E (C C) + 5 × B.E (O=O)] [6 × B.E (C = O) + 8 × B.E. (O H) + 3] × |R.E| of CO_2 ...

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Standard XI

Chemistry

Enthalpy of Combustion

The energy of...

Question

The energy of combustion of propane $(C_{3} H_{8})$ gas in terms of given data is:
Bond energy (kJ/mol)
$\begin{matrix} ϵ_{C - H} & ϵ_{O = O} & ϵ_{C = O} & ϵ_{O - H} & ϵ_{C - C} + x_{1} & + x_{2} & + x_{3} & + x_{4} & + x_{5} \end{matrix}$
Resonance energy of $C O_{2}$ is $- z k J / m o l$ and $△ H_{v a p o r i z a t i o n} [H_{2} O] i s y k J / m o l$

8 x_{1} + 2 x_{5} + 5 x_{2} - 6 x_{3} - 8 x_{4} - 4 y - 3 z

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6 x_{1} + x_{5} + 5 x_{2} - 3 x_{3} - 4 x_{4} - 4 y - 3 z

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8 x_{1} + 2 x_{5} + 5 x_{2} - 6 x_{3} - 8 x_{4} - y - z

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8 x_{1} + 2 x_{5} + 5 x_{2} - 6 x_{3} - 8 x_{4} + 4 y + 3 z

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Solution

The correct option is D $8 x_{1} + 2 x_{5} + 5 x_{2} - 6 x_{3} - 8 x_{4} + 4 y + 3 z$
$C_{3} H_{8} (g) + 5 O_{2} (g) \to 3 C O_{2} (g) + 4 H_{2} O (l) △ C H = [8 \times B . E . (C - H) + 2 \times B . E (C - C) + 5 \times B . E (O = O)] - [6 \times B . E (C = O) + 8 \times B . E . (O - H) + 3] \times | R . E | o f C O_{2} + 4 \times △ v a p H (H_{2} O)$
$△ H_{C_{3} H_{8}}$ = $[8 \times (+ x_{1}) + 2 \times (+ x_{5}) + 5 \times (+ x_{2})] - [6 \times + (x_{3}) + 8 \times (+ x_{4}) + 3 \times (- z))] + 4 \times (y)$
$= 8 x_{1} + 2 x_{5} + 5 x_{2} - 6 x_{3} - 8 x_{4} + 4 y + 3 z$

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Similar questions

Q. The enthalpy of combustion of propane (

C_{3} H_{8}

) gas in terms of given data is :
Bond energy (kJ/mol)

$ε_{C - H}$	$ε_{O = O}$	$ε_{C - = O}$	$ε_{O - H}$	$ε_{C - C}$
$+ x_{1}$	$+ x_{2}$	$+ x_{3}$	$+ x_{4}$	$+ x_{5}$

Resonance energy of

{C O}_{2}

- z k J / m o l

and

Δ H_{v a p o r i z a t i o n} [H_{2} O (l)]

y (k J / m o l)

Q. The energy of combustion of propane

(C_{3} H_{8})

gas in terms of given data is:
Bond energy (kJ/mol)

\begin{matrix} ϵ_{C - H} & ϵ_{O = O} & ϵ_{C = O} & ϵ_{O - H} & ϵ_{C - C} + x_{1} & + x_{2} & + x_{3} & + x_{4} & + x_{5} \end{matrix}

Resonance energy of

C O_{2}

- z k J / m o l

and

△ H_{v a p o r i z a t i o n} [H_{2} O] i s y k J / m o l

Q. Calculate the heat of combustion of ethene

C H_{2} = C H_{2} (g) + 3 O_{2} (g) \to 2 C O_{2} (g) + 2 H_{2} O (I)

The bond energy data are given below

C = C = 619 k J m o l^{- 1}

C - H = 414 k J m o l^{- 1}

O = O = 499 k J m o l^{- 1}

C = O = 724 k J m o l^{- 1}

O - H = 460 k J m o l^{- 1}

Q. Calculate heat of combustion of ethene (figure) from bond energy data:

C = C, C - H, O = O, C - O, O - H

B E (k J {m o l}^{- 1}) : 619, 414, 499, 724, 460

Q. Internal energy change for combustion of oxalic acid (

H_{2} C_{2} O_{4}

) is

- 245.7 k J / m o l

. The enthalpy of the combustion of oxalic acid at

27^{o}

C is:

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The energy of combustion of propane (C3H8) gas in terms of given data is: Bond energy (kJ/mol) ϵC−HϵO=OϵC=OϵO−HϵC−C+x1+x2+x3+x4+x5 Resonance energy of CO2 is −z kJ/mol and △Hvaporization[H2O] is y kJ/mol