Answers to Problem Set 14

• Ch. 20
• Ch. 21

Answers for the even numbered problems:

20-66. (a) m_Ar = M_Ar/N_A = 6.6 x 10^-26 kg; (b) M_Ar = C_V/c_V = 39.8 g/mole; (I did part (b) first).

20-70. (a) Q = n C_p DT = 6980 J; (b) DE_int = n C_V DT = 4990 J; (c) W = Q - DE_int = 1990 J; (d) DK_trans = (3/2) n R DT = 2990 J.

21.60. W = Q_H / (K+1) = 1.57 MJ in one hour

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Last modified 4 May, 2000. © Gregory C. Sloan.