Calculate the Enthalpy Change That Occurs When 1 Lb (454

question 72

Multiple Choice

Calculate the enthalpy change that occurs when 1 lb (454 G) of mercury freezes at its freezing point (234.3 K) .The standard enthalpy of fusion of mercury is 2.29 kJ.mol^-1.

• A)(-2.29 kJ )
• B)(-1.04 * 10³ kJ)
• C)+5.18 kJ
• D)+2.29 kJ
• E) -5.18 kJ

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Definitions:

Geometry

The branch of mathematics concerned with the properties and relations of points, lines, surfaces, and solids.

Ammonia Molecule

A compound consisting of one nitrogen atom and three hydrogen atoms (NH3), often used in cleaning products and as a fertilizer.

Trigonal Pyramidal

A molecular geometry where a central atom is surrounded by three atoms placed at the corners of a pyramid, with a vertex missing.

Central Atom

In a molecular structure, the atom that is bonded to several other atoms.