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At bubble point the liquid starts to boil so there is no change of temperature, at the dew point the vapors starts to condense. But why is the bubble point temperature differs from the dew point temperature. When phase changes there is no change of temperature but why is there a difference...

Does the size of the reactor (catalyst weight) needs to be changed if we want to change the feed. Initially only fresh reactants were charged but now since the products forms not only the desired product but also undesired products as well, so I want to recycle back the undesired products but...

I want to calculate noise level and wearing of PCV with a nominal pipe dia of 2 in, valve size is 1 in and valve body is 0.375 in. The process conditions are: Pressure: 50Psig Drop through valve: 15 psi Flow: 310 lb/hr Mol. Wt.: 57 Temp: 250 F Please provide me the details to check this valve...

Hi, I need to know about JP4 and JP8 fuels. They both are made by blending of kero with additives. Which one is economically better?

I want to know how a PCV (Pressure control valve) works. Only pressure matters regardless of flow? or the flow as well as gas density also matters?

I want to know how can we express specific gravity for gases at actual conditions. Is it density of gas/density of air at STP or Is it density of gas/density of air at that pressure and temperature Please clarify.