Recent Tutoring Session Reviews
"The student is studying for the physics exam. We started with basic material such as vectors, understanding graphs, significant figures and scientific notation."
"The student and I reviewed concepts of state changes. We also worked on several problems regarding concentration and making solutions."
"In preparation for the student's chemistry test, we focused on intermolecular forces. We distinguished intra (within) and inter (between) to emphasize that intermolecular forces occur between molecules. We then focused on a very useful chart in her worksheet and interpreted it. The stronger the intermolecular force, the higher the boiling point (the higher the temperature required to change the phase). In terms of intermolecular force strength: ionic bonds > hydrogen bonds > dipole-dipole > London dispersion. We interpreted a graph that illustrated the trend that as molar mass increases, so does the boiling point. The exception of this trend is for molecules that undergo hydrogen bonding, such as H20 and HF. Even though these molecules have smaller molar masses, they have high boiling points because of hydrogen bonding. Next, she walked through a problem involving heat energy (Q) calculation, for example, using Q = mC?T. The equation varies based on what phase of the heat curve is being described. We did dimensional analysis to confirm that heat is in Joules. I sent a follow-up email describing how vapor pressure and boiling point are related: The boiling point is the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure. She solidly understands the current topics and is very prepared for her test."