The enthalpies for the following reactions at 25oC are given- 12H2g-12O2g- OHg- H-10-06kcal H2g- 2Hg- H-104-18kcal O2g- 2Og- H-118-32kcal Calculate the O-H bond energy in the OH group-

Required equation is H(g)+O(g)→ O H(g);Δ H=? Given: 12H_2(g)+12O_2(g)→ OH(g);Δ H=+10.06kcal H(g)→12H_2(g);Δ H= 52.09kcal O(g)→12O_2(g);Δ H= 52 ...

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Byju's Answer

Standard XII

Chemistry

Enthalpy

The enthalpie...

Question

The enthalpies for the following reactions at $25^{o} C$ are given:
$\frac{1}{2} H_{2} (g) + \frac{1}{2} O_{2} (g) \to O H (g); Δ H = 10.06 k c a l$
$H_{2} (g) \to 2 H (g); Δ H = 104.18 k c a l$
$O_{2} (g) \to 2 O (g); Δ H = 118.32 k c a l$
Calculate the $O - H$ bond energy in the $O H$ group.

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Solution

Required equation is
$H (g) + O (g) \to O - H (g); Δ H = ?$
Given:
$\frac{1}{2} H_{2} (g) + \frac{1}{2} O_{2} (g) \to O H (g); Δ H = + 10.06 k c a l$
$H (g) \to \frac{1}{2} H_{2} (g); Δ H = - 52.09 k c a l$
$O (g) \to \frac{1}{2} O_{2} (g); Δ H = - 52.16 k c a l$
Adding $H (g) + O (g) \to O H (g); Δ H = - 101.19 k c a l$

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Similar questions

The enthalpies for the following reactions at 25°C are given.
$\frac{1}{2} H_{2} (g) + \frac{1}{2} O_{2} (g) \to O H (g); △ H = 10.06 K c a l$
$H_{2} (g) \to 2 H (g); △ H = 104.18 K c a l$
$O_{2} (g) \to 2 O (g); △ H = 118.32 K c a l$

Calculate the OH bond energy in the O - H group