We’re being asked to determine the standard enthalpy change of formation (ΔH˚rxn) for the reaction:
CH4 + Br2 → CH3Br + HBr Balanced Equation
Recall that ΔH˚rxn can be calculated from the bond enthalpies of the reactants and products involved:
First launch the video. The video will show you the Smart Figure. After watching the video, answer the related follow-up question. You can watch the video again or reference the Smart Figure in the book(Pages 193 - 193) at any point.
This figure shows the gas phase reaction between methane, CH4, and chlorine, Cl2 to produce methyl chloride, CH3Cl and hydrogen chloride, HCl. Using the average bond enthalpies in the table below, estimate the Hrxn for the analogous gas phase reaction between methane, CH4, and bromine, Br2, to produce methyl bromide, CH3Br, and hydrogen bromide, HBr.
|TABLE 5.4 Average Bond Enthalpies (kJ/mol)|
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