Questions from General Chemistry

Q: What do we call the energies required, respectively, to melt

What do we call the energies required, respectively, to melt and to vaporize 1 mole of a substance? Which of these energies is always larger for a given substance? Why?

Q: Consider the following series of atoms or ions: S2-, S

Consider the following series of atoms or ions: S2-, S, S2+, Cs+, Sr2+. a. Which of the species has the smallest size? b. Which of the species has the largest ionization energy?

Q: A particular balloon is designed by its manufacturer to be inflated to

A particular balloon is designed by its manufacturer to be inflated to a volume of no more than 2.5 L. If the balloon is filled with 2.0 L of helium at sea level, is released, and rises to an altitude...

Q: What are London dispersion forces and how do they arise in a

What are London dispersion forces and how do they arise in a nonpolar molecule? Are London forces typically stronger or weaker than dipole–dipole attractions between polar molecules? Are London forces...

Q: Describe in detail the microscopic processes that take place when a liquid

Describe in detail the microscopic processes that take place when a liquid boils. What kind of forces must be overcome? Are any chemical bonds broken during these processes?

Q: Arrange the atoms and/or ions in the following groups in

Arrange the atoms and/or ions in the following groups in order of decreasing size. a. O, O+, O2- b. Fe2+, Ni2+, Zn2+ c. Ca2+, K+, Cl-

Q: For each of the following sets of volume/temperature data,

For each of the following sets of volume/temperature data, calculate the missing quantity. Assume that the pressure and the amount of gas remain constant. a. V = 22.4 L at 0 °C; V = 44.4 L at? K b....

Q: Although the noble gas elements are monatomic and could not give rise

Although the noble gas elements are monatomic and could not give rise to dipole–dipole forces or hydrogen bonding, these elements still can be liquefied and solidified. Explain.

Q: You have a gas in a container fitted with a piston,

You have a gas in a container fitted with a piston, and you change one of the conditions of the gas such that a change takes place, as shown below: State three distinct changes you can make to accom...

Q: Given each of the following sets of values for three of the

Given each of the following sets of values for three of the gas variables, calculate the unknown quantity. a. P = 21.2 atm; V = 142 mL; n = 0.432 mol; T =? K b. P =? atm; V = 1.23 mL; n = 0.000115 m...