Use Bond Energies to Estimate the Enthalpy of Formation of HBr(g)

question 16

Multiple Choice

Use bond energies to estimate the enthalpy of formation of HBr(g) . BE(H-H) = 436 kJ/mol
BE(Br-Br) = 192 kJ/mol
BE(H-Br) = 366 kJ/mol

• A)+262 kJ/mol
• B)-52 kJ/mol
• C)-104 kJ/mol
• D)+104 kJ/mol
• E)+52 kJ/mol

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Definitions:

Method of Elimination

A technique for solving systems of linear equations by adding or subtracting equations in order to eliminate one of the variables.

System of Equations

A set of equations with the same variables, where the solution must satisfy all the equations in the system simultaneously.

Method of Substitution

A technique used to solve systems of equations by solving one equation for one variable and substituting that expression into the other equation.

System of Equations

A set of equations with the same variables, which are solved together to find a common solution for those variables.