Using bond-energy data, what is ?_rH for the following reaction? CH₄(g) + 2Cl₂(g) ? CCl₄(g) + 2H₂(g)
$\begin{array} { l l } \text { Bond } & \text { Bond Energy } ( \mathrm { kJ } / \mathrm { mol } ) \\\mathrm { C } - \mathrm { H } & 413 \\\mathrm { H } - \mathrm { H } & 432 \\\mathrm { Cl } - \mathrm { Cl } & 242 \\\mathrm { C } - \mathrm { Cl } & 328\end{array}$

Question

Using bond-energy data, what is ?_rH for the following reaction? CH₄(g) + 2Cl₂(g) ? CCl₄(g) + 2H₂(g)

\begin{array} { l l } \text { Bond } & \text { Bond Energy } ( \mathrm { kJ } / \mathrm { mol } ) \\\mathrm { C } - \mathrm { H } & 413 \\\mathrm { H } - \mathrm { H } & 432 \\\mathrm { Cl } - \mathrm { Cl } & 242 \\\mathrm { C } - \mathrm { Cl } & 328\end{array}

Quizplus · Accepted Answer

?_rH = [?H(reactants) - ?H(products)]?H(reactants) = [4(413 kJ/mol) + 2(242 kJ/mol)] = 1694 kJ/mol?H(products) = [4(328 kJ/mol) + 2(432 kJ/mol)] = 1850 kJ/mol?_rH = [1694 kJ/mol - 1850 kJ/mol] = -156 kJ/mol

Using Bond-Energy Data, What Is ?rH for the Following Reaction

Using Bond-Energy Data, What Is ?_rH for the Following Reaction