ABSTRACT
J; (c) Cv = 21.7 J/mole·K, c" = 30 J/mole·K 2.6 (a) + 123.4 kJ, (b) -22.5 kJ, (c) 0. Total work = 100.9 kJ done by the system. 2.7 P = 0.3 atm 2.8 7958 J, T,ax = 1116 K, T,;, = 255 K
Chapter Three 3.1 (a) 5.76 J/K, (b) 0 J/K, (c) -8.65 J/K 3.2
a D.U = D.H = q = w = 0, D.S = 9.13 J/K b D.U = q = 1247 J, D.H = 2079 J, w = 0, D.S = 3.59 J!K c D.U = D.H = 0, q = w = 3654 J, D.S = 9.13 J/K d D.U = -1247 J, D.H = q = -2079 J, w = -831 J, 6.S = 5.98 J/K
totals: D.U = D.H = 0, w = q = 2322 J, 6.S = 15.88 J/K
3.3 T1 300 K, T2 600 K. The isothermal expansion is conducted at 300 K. 3.4 H 42750 J, S 59.7 J/K 3.5 The final temperature is 323.32 K, which is greater than 323 K because the
heat capacity increases with increasing temperature. Thus the decrease in temperature caused by withdrawing heat q from hot copper is less than the increase in temperature caused by adding heat q to cold copper. The quantity of heat transferred is 1233 J and Sirr 0.6 J/K.
