At 25°C, the Standard Enthalpy of Formation of KCl(s)is -435 $\Delta$

question 106

Multiple Choice

At 25°C, the standard enthalpy of formation of KCl(s) is -435.87 kJ/mol. When one mole of KCl(s) is formed by reacting potassium vapor and chlorine gas at 25°C, the standard enthalpy of reaction is -525.86 kJ/mol. Find $\Delta$ H° for the sublimation of potassium, K(s) $\rarr$ K(g) , at 25°C.

• A)-345.88 kJ/mol
• B)45.00 kJ/mol
• C)345.88 kJ/mol
• D)89.99 kJ/mol
• E)-525.86 kJ/mol

---

Definitions:

Rapport

A positive, harmonious relationship characterized by mutual trust, understanding, and emotional affinity.

Intake Interview

An assessment technique that provides counselors with information about a client’s past functioning and how it relates to his or her current situation and the problems he or she is facing.

Effective

Producing a desired or intended result, often used to describe interventions, methods, or treatments.

Formative Evaluation

Real time assessments conducted during the counseling process to determine the efficacy of a given treatment or intervention as it is being implemented.