(A) The molar mass of $H_2$ is $2 \ g/mol$. Number of moles of $H_2$ in $4 \ g = \frac{4 \ g}{2 \ g/mol} = 2 \ mol$. Bond energy is defined as the ene

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(A) The molar mass of $H_2$ is $2 \ g/mol$. Number of moles of $H_2$ in $4 \ g = \frac{4 \ g}{2 \ g/mol} = 2 \ mol$. Bond energy is defined as the energy required to dissociate $1 \ mole$ of bonds. Bond energy of $H-H = \frac{\text{Total energy}}{\text{Number of moles}} = \frac{208 \ kcal}{2 \ mol} = 104 \ kcal/mol$.

Class 11 Chemistry Thermodynamics Heat of reaction, Bond energy and Hess law

Medium

Energy required to dissociate $4 \ g$ of gaseous hydrogen into free gaseous atoms is $208 \ kcal$ at $25 \ ^oC$. The bond energy of $H-H$ bond will be

A
$104 \ kcal$
B
$10.4 \ kcal$
C
$1040 \ kcal$
D
$104 \ cal$

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Class 11

Chemistry Questions

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Thermodynamics

Subtopic

Heat of reaction, Bond energy and Hess law

The enthalpy change of which reaction corresponds to $\Delta H_f^o$ for $Na_2CO_{3(s)}$ at $298 \ K$?

Medium

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State Hess's Law of Constant Heat Summation.

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What is the enthalpy change for the reaction $2C(\text{graphite}) + 3H_{2(g)} \rightarrow C_2H_{6(g)}$ called?

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State Hess's Law of Constant Heat Summation.

Easy

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Which of the following equations corresponds to the definition of enthalpy of formation at $298 \ K$?

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Energy required to dissociate $4 \ g$ of gaseous hydrogen into free gaseous atoms is $208 \ kcal$ at $25 \ ^oC$. The bond energy of $H-H$ bond will be

Similar Questions

The enthalpy change of which reaction corresponds to $\Delta H_f^o$ for $Na_2CO_{3(s)}$ at $298 \ K$?

State Hess's Law of Constant Heat Summation.

What is the enthalpy change for the reaction $2C(\text{graphite}) + 3H_{2(g)} \rightarrow C_2H_{6(g)}$ called?

State Hess's Law of Constant Heat Summation.

Which of the following equations corresponds to the definition of enthalpy of formation at $298 \ K$?

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