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Types of Redox Reactions

The standard ...

Question

The standard heat of formation at $298 K$ for $C {C l}_{4} (g), H_{2} O (g), {C O}_{2} (g), H C l (g)$ are $- 25.5, - 57.8, - 94, 1, - 22.1$ $k c a l {m o l}^{- 1}$ respectively, calculate $Δ H_{298}^{o}$ for the reaction,
$C {C l}_{4} (g) + 2 H_{2} O (g) ⟶ {C O}_{2} (g) + 4 H C l (g)$

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Solution

$Δ H_{r e a c t i o n} = \sum H e a t o f f o r m a t i o n o f p r o d u c t s - \sum H e a t o f f o r m a t i o n o f r e a c t a n t s$
$[Δ H_{f ({C O}_{2})} - Δ H_{f (H C l)}] - [Δ H_{f (C {C l}_{4})} - Δ H_{f (H_{2} O)}] = [- 94.1 + 4 \times (- 22.1)] - [- 25.5 + 2 \times (- 57.8)] = - 41.4 k c a l$

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Similar questions

Q. The standard heats of formation at

298 K

C {C l}_{4} (g), H_{2} O (g), {C O}_{2} (g)

H C l (g)

- 25.5, - 57.8, - 94.1

- 22.1

k c a l

{m o l}^{- 1}

respectively. Calculate

Δ H_{298}^{o}

for the reaction.

C {C l}_{4} (g) + H_{2} O (g) ⟶ {C O}_{2} (g) + 4 H C l (g)

Q. The standard enthalpies of formation at

300 K

C C l_{4} (l), H_{2} O (g), C O_{2} (g)

H C l (g)

- 107, - 242, - 394

- 93 {kJ mol}^{- 1}

respectively. The value of

Δ U

for the following reaction at

300 K

C C l_{4} (l) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)

Q. The standard enthalpies of formation at 300 K for

C C l_{4} (l), H_{2} O (g), C O_{2} (g) a n d H C l (g) a r e - 107, - 242, - 394 a n d - 93 k J m o l^{- 1},

respectively. The value of

△ U_{300}^{o}

for the reaction:

C C l_{4} (l) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)

- x k J m o l^{- 1}

. Find the value of

x

R = 8.314 J K^{- 1} m o l^{- 1}

Q. The standard enthalpies of formation at 300 K for

C C l_{4} (l), H_{2} O (g), C O_{2} (g) a n d H C l (g) a r e - 107, - 242, - 394 a n d - 93 k J m o l^{- 1},

respectively. The value of

△ U_{300}^{o}

for the reaction:

C C l_{4} (l) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)

Q. The standard enthalpies of formation at 300 K for

C C l_{4} (l), H_{2} O (g), (C O_{2}) a n d H C l (g) a r e - 107, - 242, - 394 a n d - 93 k J m o l^{- 1},

respectively. The value of

△ U_{300}^{o}

for the reaction

C C l_{4} (l) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)

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