[url]http://mw.concord.org/modeler1.3/mirror/chemistry/gasexperiment.html[/url] [img:04dd2768d8]http://mw.concord.org/modeler1.3/mirror/chemistry/pt.gif[/img:04dd2768d8] [img:04dd2768d8]http://mw.concord.org/modeler1.3/mirror/chemistry/pv.gif[/img:04dd2768d8] [img:04dd2768d8]http://mw.concord.org/modeler1.3/mirror/chemistry/vt.gif[/img:04dd2768d8]