CLEP CLEP Chemistry Flashcards

Aufbau principle

The Aufbau principle explains how electrons fill energy levels in an atom

Aufbau

The Aufbau principle is a fundamental concept in chemistry

Aufbau: energy levels, Pauli: electron spin

The Aufbau principle and Pauli Exclusion principle are two distinct concepts in chemistry

1) Lowest energy level, 2) Higher energy levels

The Aufbau principle states that electrons fill the lowest available energy levels first

Energy levels: 1s, 2s, 2p, etc.

The energy level diagram shows the arrangement of electrons in an atom

Forgetting to fill lowest energy levels first

The Aufbau principle states that electrons fill the lowest available energy levels first

Increasing effective nuclear charge

The researcher's observation is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius.

effective nuclear charge

The correct answer is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius.

Across a period: decreases, down a group: increases

The correct answer is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius, while as you move down a group, the number of energy levels increases, resulting in an increase in atomic radius.

Increasing effective nuclear charge, decreasing atomic radius

The correct answer is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius.

As effective nuclear charge increases, atomic radius decreases

The correct answer is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius.

Forgetting to consider effective nuclear charge

The correct answer is based on the principle that as you move from left to right across a period, the effective nuclear charge increases, resulting in a decrease in atomic radius.

A measure of disorder or randomness in a system.

Understanding entropy is crucial for the CLEP Chemistry exam as it is a fundamental concept in thermodynamics. Entropy helps predict the spontaneity of reactions.

The energy available to do work in a system at constant temperature and pressure.

Gibbs Free Energy is essential for determining the spontaneity of a reaction, making it a key concept for the exam. It combines entropy and enthalpy to predict reaction outcomes.

The reaction shifts to consume the added reactant, re-establishing equilibrium.

This question assesses the student's understanding of Le Chatelier's Principle, which is vital for predicting the behavior of systems at equilibrium. It requires application of the concept to a specific scenario.

False. Entropy can decrease with temperature if the system becomes more ordered.

This card addresses a common misconception about entropy and temperature. It is essential to understand that entropy is related to disorder, not just temperature, to avoid mistakes on the exam.

Thermodynamics predicts the feasibility of a reaction, while kinetics predicts the rate of the reaction.

Distinguishing between thermodynamics and kinetics is critical for understanding chemical reactions. This difference is fundamental to predicting reaction outcomes and understanding the principles of equilibrium and reaction rates.

Entropy increases as temperature increases.

This question assesses the ability to apply thermodynamic principles to a given scenario, which is vital for the CLEP Chemistry exam. It tests understanding of the relationship between temperature and entropy.

False. K is affected by temperature changes, but the equilibrium constant expression itself is not.

This question addresses a common misconception about equilibrium constants and temperature, which is a key concept in thermodynamics. Correcting this misunderstanding is important for the exam.

Gibbs Free Energy includes enthalpy and temperature, while entropy only considers disorder or randomness.

Distinguishing between Gibbs Free Energy and Entropy is critical for the CLEP Chemistry exam, as both concepts are fundamental to thermodynamics. This question ensures understanding of their distinct roles.