Gas A2 reacts with gas B2 to form gas AB at a constant temperature. The bond energy of AB is much greater than that of either reactant. What can be said about the sign of H? Ssurr? S? Explain how potential energy changes for this process. Explain how random kinetic energy changes during the process. 4
Animals Part 2: Deuterostomes 1) Deuterostomes a) Blastopore becomes anus b) 4 phyla c) No fossils of common ancestor candidates 2) Phylum Echinodermata a) Echinoderm Traits i) Water vascular system with tube feet ii) Endoskeleton stiff or loose plates (stars) 3) Phylum Chordata a) Notochord – (Def.) flexible rod running along dorsal axis of body b) Nerve cord c) Pharyngeal slits – allows water to pass through d) Muscular, postanal tail 4) Invertebrate Chordates (2 subphyla) a) Cephalochordates i) adult possesses all 4 chordate traits ii) suspension feeders iii) simple “brain” 5) Vertebrates (subphylum) a) head with cranium (skull) b) vertebrae
