# Why does smoke rise?

• I
• jaumzaum
jaumzaum
If we consider that the heating of the products created in the combustion of paper to be an almost adiabatic process (as it's extremely fast), then
$$T^{1.4} P^{-0.4} = const.$$
If we double the temperature, we multiply the pressure by 11.3
The density of an ideal gas is
$$\rho=PM/RT$$
If we double the temperature, the density would be multiplied by 5.7

So why would the smoke rises if it became more dense?

Mentor
If we double the temperature, we multiply the pressure by 11.3
How can that be if the combustion isn't happening in an enclosure?

Dale and etotheipi