About This Chapter
MCAS ST&E Chemistry: Thermodynamics - Chapter Summary
On the day you take the MCAS - Science and Technology/Engineering High School Chemistry test, it's good to feel prepared to answer any questions you face. This chapter is designed to help you study for thermodynamics questions. By reviewing these fun lessons, you will be able to:
- Define and describe the law of thermodynamics and calorimetry
- Identify state functions in thermochemistry
- Discuss energy transfer in physical and chemical processes
- Explain how to use Hess's law to calculate the change in enthalpy of a reaction
- Share how to predict the entropy of physical and chemical changes
- Describe the relationship between enthalpy, free energy and entropy
- Provide details about endothermic and exothermic reactions
Our study guide makes studying for the test convenient by allowing you to review thermodynamics lessons in any sequence you desire and as often as you'd like. Watch lessons as videos or read them as full transcripts from your home computer, smartphone or tablet. When ready, test your knowledge of the subject area by taking lesson quizzes and a chapter exam. If you have any questions about lesson topics, feel free to submit them to our experts.
1. The Laws of Thermodynamics
Learn about the first and second laws of thermodynamics. Find out how energy is generated, how it converts from one form to another, and what happens to energy in a closed system.
2. State Functions in Thermochemistry
This lesson defines state functions and explains why state functions are so useful in thermochemistry and thermodynamics. You'll also see a few examples of common state functions.
3. Enthalpy: Energy Transfer in Physical and Chemical Processes
This video explores the relationship between chemistry and energy. We learn the general properties of energy and the concepts of temperature and heat. We will learn about energy flow and consider the enthalpy change during chemical reactions.
4. Using Hess's Law to Calculate the Change in Enthalpy of a Reaction
Want to make sure you don't blow yourself up during a chemical reaction? This lesson will help you avoid this by teaching you Hess's Law. This is one way to calculate the heat transferred, or enthalpy change, of a chemical reaction.
5. Predicting the Entropy of Physical and Chemical Changes
Ever wonder why your bedroom always ends up a mess within hours of you tidying up? That is the magic of entropy. In this lesson, you'll learn why disorder is the natural state of matter and how we can predict entropy change in a physical or chemical reaction.
6. Calorimetry: Measuring Heat Transfer and Heat Capacity
This video lesson explains the technique of calorimetry used to measure heat transfer in chemical reactions. You will see how different materials have different specific heat capacities. You will learn how to carry out heat calculations using a simple equation.
7. The Relationship Between Enthalpy (H), Free Energy (G) and Entropy (S)
In this video lesson, we'll study free energy (G) and its relationship to enthalpy, entropy and temperature. You'll also learn why free energy (G) is the single most useful criterion for predicting the spontaneity and direction of a chemical reaction.
8. Endothermic and Exothermic Reactions
Explore a chemical reaction at the molecular level. Learn about exothermic and endothermic reactions, what they look like and what happens when they occur. Understand enthalpy and how you can use it to predict whether a reaction will be exothermic or endothermic.
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Other chapters within the MCAS - Science & Technology-Engineering - Chemistry: Test Prep & Practice course
- MCAS ST&E Chemistry: Matter & Energy
- MCAS ST&E Chemistry: Atomic Structure
- MCAS ST&E Chemistry: Nuclear Chemistry
- MCAS ST&E Chemistry: The Periodic Table
- MCAS ST&E Chemistry: Types of Chemical Bonds
- MCAS ST&E Chemistry: Chemical Compounds & Bonds
- MCAS ST&E Chemistry: Stoichiometry & Chemical Equations
- MCAS ST&E Chemistry: Properties & Laws of Gases
- MCAS ST&E Chemistry: Solutions
- MCAS ST&E Chemistry: Chemical Reactions
- MCAS ST&E Chemistry: Chemical Equilibrium
- MCAS ST&E Chemistry: Acids, Bases, Oxidation & Reduction
- MCAS ST&E Chemistry: Scientific Method & Inquiry
- MCAS ST&E Chemistry: Laboratory Equipment & Techniques
- MCAS ST&E Chemistry: Mathematics Principles in Chemistry
- MCAS - Science & Technology-Engineering - Chemistry Flashcards