tag:blogger.com,1999:blog-4390590695267547980.post6869286760869084167..comments2023-02-03T00:25:45.307-08:00Comments on CaptDallas' Redneck Theoretical Physics Forum: Cross Roads Route 65Recovering in the Florida Keyshttp://www.blogger.com/profile/07913299764512464597noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4390590695267547980.post-45574894388626527222012-12-11T10:10:55.795-08:002012-12-11T10:10:55.795-08:00Doug, Doug, Doug, Density does impact heat capaci...Doug, Doug, Doug, Density does impact heat capacity. A denser gas is a more viscous gas so it cannot transfer heat via convection as easily for one example. Since pressure and density are related, a pressure cooker contains more heat than a regular pot. Venus can hold more heat basically because it is a pressure cooker. <br /><br />Earth is more like a regular pot. Add more heat and the lid rattles. Unless you increase the density of the atmosphere by adding more molecules or more pressure, there is a limit to the heat the atmosphere can contain. So colder regions with more dense air can warm more than warmer regions with less dense air. As the air warms, the "average" lapse rate would change, but since the warming is not uniform, the lid will rattle more. That is about as far as you can go with a simple analogy.<br /><br /> Recovering in the Florida Keyshttps://www.blogger.com/profile/07913299764512464597noreply@blogger.comtag:blogger.com,1999:blog-4390590695267547980.post-36066868229983530832012-12-06T06:39:21.266-08:002012-12-06T06:39:21.266-08:00OK Let's look closely at what you say here ..... <br />OK Let's look closely at what you say here ... <br /><br />"gravity impacts the density of gases"<br /><br />I agree - pretty obvious compression.<br /><br />"and density impacts the heat capacity"<br /><br />I disagree, because density impacts specific heat, not heat capacity.<br /><br />"and heat transfer of gases"<br /><br />Yes, adiabatic lapse rate is inversely proportional to specific heat for constant gravity. <br /><br />But high pressure does not maintain high temperature when there is insufficient energy input, because the lapse rate is sufficient to permit cooling in such a case as is found at the Venus surface/atmosphere interface.<br /><br />The energy input at that interface is only about 10% of what Earth receives from the Sun at its surface, yet the surface of Venus is hundreds of degrees hotter than the mean radiating temperature for the planet.<br /><br />Doug Cotton<br /> <br />Doug Hendersonhttps://www.blogger.com/profile/18402239699600122336noreply@blogger.com