The diffrence between heat of reaction at constant volume and constant pressure for the reaction C 2 H 2 g -5-2 O 2 g - 2 CO 2 g - H 2 O l - At 300 K in kcal is - Given - R -2 cal - mol - K -A- -0-3 KcalB- -0-3 KcalC- -0-9 KcalD- None of these

The correct option is D None of these n_g = 3/2; H = U + n_gRT U H = n_gRT = ( 3/2 ) × 2 × 300 ⇒ 0.9 kcal ...

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Standard XII

Chemistry

Enthalpy

The diffrence...

Question

The diffrence between heat of reaction at constant volume and constant pressure for the reaction

$C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) . A t 300 K i n k c a l i s : [G i v e n : R = 2 c a l / m o l . K]$

−0.3 Kcal

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+0.3 Kcal

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−0.9 Kcal

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None of these

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Solution

The correct option is D
None of these

$△ n_{g} = - \frac{3}{2}; △ H = △ U + △ n_{g} R T$

$△ U - △ H = △ n_{g} R T = - (- \frac{3}{2}) \times 2 \times 300 \Rightarrow 0.9 k c a l$

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The diffrence between heat of reaction at constant volume and constant pressure for the reaction

$C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) . A t 300 K i n K c a l i s : [G i v e n : R = 2 c a l / m o l . K]$

The diffrence between heat of reaction at constant volume and constant pressure for the reaction

$C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) . A t 300 K i n k c a l i s : [G i v e n : R = 2 c a l / m o l . K]$

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 $C_{6} H_{12} O_{6} (s) + 6 O_{2} \to 6 C O_{2} (g) + 6 H_{2} O (v)$ 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 difference between heats of reaction at constant pressure and at constant volume for the reaction

C_{2} H_{6 (l)} + 5 O_{2 (g)} \to 2 C O_{2 (g)} + 6 H_{2} O_{(g)}

25 C

k J

is?

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The diffrence between heat of reaction at constant volume and constant pressure for the reaction C2H2(g)+52O2(g)→2CO2(g)+H2O(l). At 300K in kcal is : [Given: R=2 cal/mol.K]

The correct option is D None of these △ng=−32;△H=△U+△ngRT △U−△H=△ngRT=−(−32)×2×300⇒0.9 kcal

The diffrence between heat of reaction at constant volume and constant pressure for the reaction

$C_{2} H_{2} (g) + \frac{5}{2} O_{2} (g) \to 2 C O_{2} (g) + H_{2} O (l) . A t 300 K i n k c a l i s : [G i v e n : R = 2 c a l / m o l . K]$

The correct option is D
None of these

$△ n_{g} = - \frac{3}{2}; △ H = △ U + △ n_{g} R T$

$△ U - △ H = △ n_{g} R T = - (- \frac{3}{2}) \times 2 \times 300 \Rightarrow 0.9 k c a l$