Answers to practice exam-IV

 1.) FFTFTF
 2.)  (a) 24693J  (b) (i) 41.3C (ii) 68.8C  (c) 3604J,6000J  (d) system does work in case (i)
 3.) (a) 1.35*10^6J  (b) del(S_cold)=6338J/K, del(S_hot)=-4688J/K,
     del(S_tot)=1651J/K   (c) W=2.08*10^4J, Q_c=5.92*10^4J

 4.) (a) 2.23mol (b) 4.72*10^5Pa  (c) 550m/s (d) T=336K, W=1.7*10^3J
 5.) (a) 244.3K (b) 7.6mol
 6.) (a) 364K (b) 5.014cm