PreparED Study Materials
CHEM 100: Chemistry for the Consumer (GL)
School: University of Wisconsin - Whitewater
Number of Notes and Study Guides Available: 2
Notes
Videos
Lattice Energy: Always Positive; Hydration Energy: Always Negative
Want To Learn More? To watch the entire video and ALL of the videos in the series:
In this video we clarify why lattice energy in solids is always a positive value due to the energy needed to separate ions making it an endothermic process. On the flip side hydration energy is always negative as it releases heat when ions dissolve in water making it an exothermic reaction. We use sodium chloride as a real-world example to illustrate these crucial thermodynamic concepts
Calculating Water's Freezing Point at Various Concentrations: A Chemis
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Learn how to compute the freezing point of water at various solution concentrations using the freezing point depression formula. Uncover the relationship between concentration and the lowered freezing points for four distinct solutions. Equip yourself with essential knowledge on the effects of solute concentration on water's freezing behavior.
0.800g Match to SO?: Volume Calculation at 725 Torr & 32°C!
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Detailed walkthrough of calculating sulfur dioxide gas volume produced from burning tetraphosphorus trisulfide. Utilizes stoichiometry and the Ideal Gas Law to derive results under specific conditions. Step-by-step guide for understanding chemical reactions and gas volume calculations
Balancing Equations: From Lead Sulfide to Ammonia Reactions
Want To Learn More? To watch the entire video and ALL of the videos in the series:
This video shows you how to balance equations from the reaction of lead(II) sulfide with hydrochloric acid to ammonia's interaction with oxygen. Understand the nuances of atom balancing and grasp the precise stoichiometric relationships.
Understanding Microwaves: Boiling Water's Time and Photon Count
Want To Learn More? To watch the entire video and ALL of the videos in the series:
This video breaks down the process of calculating the time and number of photons required to boil water in a microwave. Using given power, wavelength, and water specifics, we determine both energy needs and photon count.