Midterm Exam #1
Physical Chemistry for Life Sciences
September 27, 2006
State all your assumptions and show complete working.
Attempt all questions (in any order).
You will require data in the attached tables and may re
l. Onemole ofan ideal gasundergoes n isotlemal expamionat 300K ftom 1.00atm to a final
pressure hile performing200Jof expansion ork.
(a) Wlal is the chaqe ofthe intemal energyAU ofthe system? 2 points)
(b) Doesthe gasabsorbor release eatin this pr
1 . ( 25 p ts)
A small protein domaincan exist in eitherhelical form or randomcoil. The equilibrium
constant or the transitionftom the helical form to randomcoil is 0.86 at 313K and 0.35 at
tte lr5 (a) Calculatethe ArHo and A"S0(assumiag both are