Heat of reaction for: $C_{6} H_{12} O_{6} (s) + 6 O_{2} (g) \to 6 C O_{2} (g) + 6 H_{2} O (g)$ , at constant pressure is $- 651 K c a l$ at $17^{o} C .$ Calculate the heat of reaction at constant volume at $17^{o} C$ .

- 554.5 K c a l

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- 654.5 K c a l

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- 354.5 K c a l

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- 154.5 K c a l

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Solution

The correct option is B $- 654.5 K c a l$
Given:
$Δ H = - 651 K c a l = - 651 \times 10^{3} c a l$
$Δ n = 6 + 6 - 6 = 6$ (From the given reaction)
$R = 2 c a l$
$T = (17 + 273) K = 290 K$
Solution :
$Δ H = Δ E + Δ n R T$
$\Rightarrow - 651 \times 10^{3} = Δ E + 6 \times 2 \times 290$
$\Rightarrow Δ E = - 651000 - 3480 = - 654480 c a l = - 654.48 K c a l$
Hence, the correct option is B.

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Similar questions

Q. Heat of reaction for,

C_{6} H_{12} O_{6} (s) + 6 O_{2} (g) \to 6 C O_{2} (g) + 6 H_{2} O (v)

at constant pressure is

- 651 k c a l

17^{0} C

. Calculate the heat of reaction at constant volume at

17^{0} C

Heat of reaction for $C_{6} H_{12} O_{6} (s) + 6 O_{2} (g) \to 6 C O_{2} (g) + 6 H_{2} O (v)$ at constant pressure is -651 kcal at 17°C. Calculate the heat of reaction at constant volume at 17°C.

Heat of reaction for $C_{6} H_{12} O_{6} (s) + 6 O_{2} \to 6 C O_{2} (g) + 6 H_{2} O (v)$ at constant pressure is $- 651 K c a l$ at $17^{\circ} C$ . What is the heat of reaction at constant volume at $17^{\circ} C$ ?

Q. The heat of reaction

C (s) + \frac{1}{2} O_{2} (g) ⟶ C O (g)

17^{o} C

and at constant volume is

- 29.29 k c a l

. Calculate the heat of reaction at constant pressure.

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Heat of reaction for: C6H12O6(s)+6O2(g)→6CO2(g)+6H2O(g), at constant pressure is −651Kcal at 17oC. Calculate the heat of reaction at constant volume at 17oC.

The correct option is B −654.5 KcalGiven: ΔH=−651Kcal=−651×103calΔn=6+6−6=6(From the given reaction)R=2calT=(17+273)K=290KSolution :ΔH=ΔE+ΔnRT⇒−651×103=ΔE+6×2×290⇒ΔE=−651000−3480=−654480cal=−654.48KcalHence, the correct option is B.

Heat of reaction for: $C_{6} H_{12} O_{6} (s) + 6 O_{2} (g) \to 6 C O_{2} (g) + 6 H_{2} O (g)$ , at constant pressure is $- 651 K c a l$ at $17^{o} C .$ Calculate the heat of reaction at constant volume at $17^{o} C$ .