1. A slab of materi al has area A, thickness L, and thermal conductivity k One of its surfaces (P) is maintained at temperature T and the other surface (Q) is aintained at alower temperature T. The rate of heat flow 18 from P to Qis:

A) kA(T T2

B) kL(T-7)A

C) kA(T TL

D) k(T T(LA)

E) LA(T 7

2. Pressure vs. volume graphs for a certain gas undergoing five different cyclic processes are shown below. During which cycle does the gas do the greatest positive work? P M

A) I

B) II

C) III

D) IV

E) V

3. During the tme that latent heat is involved in a change of state

A) the temperature does not change

B) the substance always expands

C) a chemical reaction takes place

D) molecular activity rem ains constant

E) kinetic energy changes into potential energy

4. In constructing a therm o meter it is NECESSARY to use a

A) expands with rising temperature

B) expands linearly with rising temperature substance that

C) will not freeze

D) will not boil

E) undergoes some change when heated or cooled

5. A quantity of an ideal gas is compressed to half its initial volume. The process may be adiabatic, isothermal or isobaric. Rank those three processes in order of the work required of an external agent, least to greatest

A) adiabatic, isothermal, isobaric

B) adiabatic, isobaric, isothemal

C) isothermal, adiabatic, isobaric

D) isobaric, adiabatic, isothemal

E) isobaric, isothemal, adiabatic

IV V