# Avogadro’s Law: History and Work Problem

Learn about Amedeo Avogadro and his funky gases, Italian Revolutions, and starry-nosed moles.

# Charles’s Law: History and Work Problem

And we're back for the second installment of our gas laws series - Charles' Law. If you need to refresh on the other gas laws in this series you can check out our post on Boyles' Law, Avogadros' Law, and the Ideal Gas Law. Let's review what a gas is: a gas a is a … Continue reading Charles’s Law: History and Work Problem

# Boyle’s Law: History and Work Problem

The two variables we're looking at today are pressure and volume, whose gas relationship was discovered during the Renaissance.

# Work Problem: Light and Photons

What we often refer to as 'light' is a narrow portion of a broad spectrum of electromagnetic radiation. This spectrum stretches from radio waves with a wavelength of 10³ m to gamma rays with a wavelength of 10⁻¹² m. We work mainly with light in the visible spectrum in this lesson, but the fundamentals learned here can be applied to any portion of the EM spectrum.

# Determining the Density of a Face-Centered Aluminum Cell

Crystals come in unique shapes, but all usually have an organized, repeating structure known as a lattice. For more information about metal lattices check out: https://www.seas.upenn.edu/~chem101/sschem/metallicsolids.html  Given Problem: An aluminum crystal has a face-centered unit cell. An aluminum atom has a radius of 143 picometers. What is the density of the solid crystal aluminum in g/cm³?  … Continue reading Determining the Density of a Face-Centered Aluminum Cell

# Gas Volume Stoichiometry Problem

Given Problem: Methanol (CH3OH) can be synthesized as: CO+2H2→CH3OH. What volume in liters of H2(g) is needed to make 35.7 grams of CH3OH?  1. We are given the temperature at 355 K and the pressure is 738 mmHg. 2.  First, you must convert the target mass of CH3OH to moles. To do this, you use the molar mass … Continue reading Gas Volume Stoichiometry Problem

# Calculating Final Temperature of Heated Al in H2O (Example)

Given Problem: A block of Aluminum has a mass of 32.5 grams and is at 45.8° C. It's placed in 105.3 grams of water at 15.4° C. What's the final temperature for both the aluminum and water? 1.  These are the equations we're going to use. Because we have two equations for q, we can substitute … Continue reading Calculating Final Temperature of Heated Al in H2O (Example)