Review Questions

1 . A   process involving   no  heat    exchange    is  known   as

(A) an  isothermal  process

(B) an  isobaric    process

(C) an  adiabatic   process

(D) an  isometric   process

2 . What    is  the specific    heat    of  a   10  g   sample  that    has absorbed    100 cal over    a   temperature

change  of  30ºC?

(A) 0.333   cal/gºC

(B) 0.666   cal/gºC

(C) 3   cal/gºC

(D) 300 cal/gºC

3 . Calculate   the enthalpy    of  formation   of  N   (g) in  the following   reaction:

N 2     (g) →   2N  (g) ΔH°rxn  =   945.2   kJ

(A) −945.2  kJ/mol

(B) 0.0 kJ/mol

(C) 472.6   kJ/mol

(D) 945.2   kJ/mol

4 . Calculate   the amount  of  heat    needed  to  bring   10  g   of  ice from    −15°C   to  110°C.  (Heat   of

fusion  =   80  cal/g;  heat    of  vaporization    =   540 cal/g.  The heat    capacities  of  both    ice and