Why Does Smoke Go up the Chimney?

Answer

Smoke goes up the chimney basically because hot air rises. When a fire is started in a chimney the air becomes warmer and less dense as compared to the air outside the chimney. This air therefore rises naturally and the smoke also rises with it.
Q&A Related to "Why Does Smoke Go up the Chimney"
Hot air rises, just as cold air lays low (sinks) to the ground. When a fire ensues, smoke (the product of carbon combustion) rises with the hot air. Chimney design is what keeps smoke
http://wiki.answers.com/Q/Why_does_smoke_go_up_the...
When a chimney is working properly, it will vent smoke outdoors. The purpose of the chimney, including its outer masonry layer and its internal, lined layer, is to provide ventilation
http://www.ehow.com/info_12138138_chimney-release-...
Smoke flows up through a chimney because the air flow is reversed to send
http://www.chacha.com/question/why-does-smoke-flow...
Downdraft is preventing the smoke from leaving. Look into a "chimney cap" especially the turbine type, which should correct the problem. Unless your comfortable with heights
http://answers.yahoo.com/question/index?qid=201012...
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