A heat of formation is:

Which one of the following processes is exothermic?

A lattice dissociation enthalpy (lattice energy) is:

Conduction, convection, and radiation are all ways of transferring _____ energy.

2.00 g of an unknown gas at STP fills a 500. mL flask. What is the molar mass (in g/mol) of the gas?

A ball has a kinetic energy of 4.50 kJ. If the ball has a mass of 120.0 g, how fast is the ball traveling, in meters per second?

Which one of the following is an example of a state function?

For which one of the following is the enthalpy of the reaction the same as the enthalpy of formation?

What is the difference between effusion and diffusion?

A 16.0 L container at 333 K holds a mixture of two gases with a total pressure of 7.00 atm. If there are 1.80 mol of Gas A in the mixture, how many moles of Gas B are present?