Describe Reid Vapour Pressure (RVP)
There is of course no such thing as ‘the vapour pressure’ of a gasoline. This is because the observed vapour pressure depends upon the volume…
Chemistry
Gasoline Viscosities of Blends
Methanol-gasoline fuels do exist, but there is not the same degree of use as there is with ethanol-gasoline fuels. This is not difficult to understand.…
Densities and Viscosities of Gasoline
3.2.1 Typical values Gasoline have densities in the range 710 to 770 kg m-3 (68 to 52°API). The density of iso-octane, the benchmark hydrocarbon for…
Physical Properties of Gasolines
Gasoline might of course simply be a straight run distillate from crude oil. It might have been blended with reformed naphtha as an extender, and…
Viscosity of blended Crude Oils
Crude oils often are blended. This is partly because very many are ‘out of spec’ in sweetness (absence of sulphur) and in lightness (reciprocal density).…
Classifications of Crude Oil in terms of Density
Density is an important property in the pricing of a particular crude oil. Lighter crudes are preferred because they are richer in the lowest boiling…
Electrical properties of Hydrocarbon
The electrical properties of any hydrocarbon have direct relevance to fire safety. If in movement or in tank filling a hydrocarbon liquid is splashed, static…
Measuring Enthalpy Changes by Calorimeter
A calorimeter is a device used to measure the heat absorbed or released during a physical or chemical change. Everything inside the bomb is the…
Standard State Enthalpy Changes
In order that chemists worldwide can compare notes on thermochemical experiments, a series of special conditions have been agreed. The term “standard state enthalpy” refers…
Thermochemical Equations
It is important to give the exact reaction equation when quoting the associated energy change. 2Mg (s) + O2 (g) → 2MgO (s), ΔH =…
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