Gaskell Text Errata
p. 603, Answer to problem 3d: DS = -5.98 J/K. The minus sign is missing in the text.
p. 604, Answer to problem 3.6: w = q2gas + q1gas = - C2(Tf-T2) - C1(Tf-T1).
The text should have either 1) used the absolute values of q2gas and q1gas or 2) used a "+" sign as shown above.
Note: q2gas + q1gas = - (q2sink + q1sink) and that C2(Tf-T2) < 0 C1(Tf-T2) > 0; therefore, work is done by the gas.
P. 604 Problem 5.1: “U = H = PV” should be “U = H - PV”