Substance X Has a Heat of Vaporization of 55

question 134

Multiple Choice

Substance X has a heat of vaporization of 55.4 kJ/mol at its normal boiling point (423°C) . For the process X(l) → X(g) at 1 atm and 423°C, calculate the value of:
-ΔS_surr

• A) -79.6 J/K•mol
• B) 0
• C) -103 J/K•mol
• D) 103 J/K•mol
• E) 79.6 J/K•mol

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Definitions:

Cations

Positively charged ions that are formed when an atom loses one or more electrons, commonly found in various biological and chemical processes.

Anions

are negatively charged ions, which are atoms or molecules that have gained one or more electrons.

Compound

A substance made up of atoms of two or more different elements joined by chemical bonds.

Atoms

The basic units of matter consisting of a nucleus surrounded by electrons, forming the building blocks of all substances.