linear and direct relationship r same right? when temperature is lowered the volume decreases?? if a pressured gas is released from vessel, ice can be seen forming on the outside of the vessels, why does this happen??
2007-03-12 13:21:46 · 1 answers · asked by Preeya 5 in Science & Mathematics ➔ Chemistry
No, a linear and a direct relationship are not the same. Two parameters may be directly related, but not by a linear relationship ... gravitational attraction is directly related to the distance between the two bodies, but the relationship is inverse square, for example.
Ice forms on the outside because the gas inside, under considerable pressure, does a lot of work to push out some of the gas. This work comes from the pressure of the gas, which is related to the temperature of the gas according to the ideal gas equation of state, Pv = RT, or P = rho * R*T. So, if P decreases, then so do rho (density) and T (temperature). It can get cold enough to cause moisture in the air to either condense into liquid or sublimate into frost on the outer wall of the container.
2007-03-12 13:38:55 · answer #1 · answered by Mick 3 · 1⤊ 0⤋