Calculate the Br-Br Bond Enthalpy Given the Standard Enthalpies of Formation

question 20

Multiple Choice

Calculate the Br-Br bond enthalpy given the standard enthalpies of formation for Br₂(g) and Br(g) ,30.7 and 112 kJ.mol^-1 ,Respectively.

• A) 193 kJ.mol^-1
• B) 255 kJ.mol^-1
• C) 143 kJ.mol^-1
• D) 81 kJ.mol^-1
• E) 30.7 kJ.mol^-1

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Definitions:

Calcite

A common mineral form of calcium carbonate, widely found in sedimentary, metamorphic, and igneous rocks.

Cleavage

The tendency of a mineral to break along flat, even surfaces as a result of weak bonding in certain directions in the mineral's crystal structure.

Fracture

a break or crack in rock or bone, often resulting from stress or impact.

Silicon Tetrahedron

A structural unit in silicate minerals, consisting of a silicon atom surrounded by four oxygen atoms in a tetrahedral arrangement.