1. In an isobaric compression of an idea gas, a) the internalenergy of the gas remains constant,    b) noheat flows into the gas, c) no work is done on the gas, d) work isdone on thegas,        and/or e) workis done by the gas.

1. An ideal gas undergoes an isothermal expansion from one stateto another.  In this process determine the following(using the sign conventions on page 413):
   • Q = 0, Q > 0 or Q < 0
   • W = 0, W > 0 or W < 0
   • ΔU = 0, ΔU > 0 or ΔU < 0

1. An ideal gas undergoes an isothermal process.  Whichof the following are true (may be more than one):  a) Noheat is added or removed from the gas, b) the internal energy ofthe gas does not change and/or c) the average kinetic energy of themolecules does not change.

1. An ideal gas undergoes an adiabatic expansion in which no heatflows into or out of the gas.  As a result determinewhich of the following properties of the gas increases (may be morethan one): a) temperature, b) pressure and/or c)volume.  

1. Can you cool your kitchen by leaving your refrigerator dooropen?  Why or why not?

1. If 1500 J of heat is added to a system and the system does 1100J of work, then what was the change in the internal energy of thesystem?   Assume the system is closed (i.e. a gasinside of a cylinder fitted with a movable piston).