CH 233: General Chemistry 3

Understand the fundamental distinctions between pure substances and mixtures. Unpack the definitions and real-world examples of elements, compounds, homogeneous, and heterogeneous mixtures.

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

Explore the calculations for mole fractions, partial pressures, and total pressure in a 22.4 dm³ vessel with H? and N? at 273.15 K.

Explore the distinction between homogeneous and heterogeneous mixtures. Through real-world examples like baby oil, chocolate chip cookies, and wine, understand their uniformity, phases, and how components are distributed.

Discover how to calculate the nutritional energy in a bag of chips, and learn the science behind converting excess energy into body fat.

In this video, the presenter demonstrates the process of calculating the volume of 125g for three different liquids—Acetone, Olive oil, and Chloroform—using the formula "Volume = Mass / Density," providing step-by-step solutions for each liquid, ultimately revealing their respective volumes. This instructional video guides viewers through the calculations and showcases the outcome for each liquid's volume.