Name: ________________________________________________________________

n  Clearly define the following

     ð  Internal energy of a system.

Sum of the energies of all of the molecules

     ð  Isothermal process

One that is carried out at constant temperature

     ð  Adiabatic process

One in which no heat is allowed to flow into or out of the system

     ð  Isobaric process

One in which the pressure is kept constant

n  Express work in terms of pressure and volume

W = PDV

n  Write the first law of thermodynamics as an equation

DU = Q - W

n  In class I discussed why the flowing of heat to a hot object to a cold object is not a violation

     of entropy. Summarize that explanation below.

There is less of an overall change when a volume is removed from a hot object than when it is added to a cold object.

n  In class I explained in detail why the metal pieces in the container separated when I rubbed a

     cylinder and touched a conductor to them.  Clearly provide that explanation below.

If the rod was charged positive then that attracted the electrons and made the leaves positive and vice versa.

n  Why did the pieces eventually come back together after a time (without touching them)?

     Where did the charge go?

Into water molecules in the air

n  The text states a use for an electroscope. What is that use?

To detect electrical charge.

n  Write Coulomb's law below.

F = kQ₁Q₂/r²

n  Coulomb's and Newton's Force law are similar. What is the major difference I discussed in

     class?

Newton's is attractive, Coulomb's can be attractive or repulsive

n  Define temperature

Average kinetic energy of individual molecules