How do I convert gas Density 0.7533 at15 de C to gas density at 40deg C?

Answer 1

For a fixed mass of gas, the universal gas law says:
pV/T = pV/T in states 1 and 2

Divide BS by the fixed mass 'm'

pV/mT = pV/mT and if we write m/V as density d and I'll assume you have constant pressure - then

(d*T)1 = (d*T)2
Note that the density d is inversely proportional to the absolute temperature only if the pressure is held constant.

Now substitute your values - not forgetting that the temperature must be in Kelvins.

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