 # Identify And Explain What Is Meant By Polarity?

Decent Essays
Argument 1: Polarity is described to be physical property of compounds such as water and fuels. Polarity also talks about how the O-H molecules of the water and fuels are attracted to each other. This is because each end of the molecule have positive charges and negative charges which allows them to attach to each other. Petrol’s polarity is non-polar. This means that if any water is mixed with petrol then the petrol would float on top of the petrol because petrol’s polarity. Petrol is made of carbon atoms bonded to hydrogen atoms forming hydrocarbon chains, this makes them non-polar. What this means is that oil molecules are attracted to each other more than water molecules. Which is shown in figure 1. Figure 1: C8H18 (Petrol) Figure 2:…show more content…
Another thing to add that ethanol burns faster than normal fuels which means that petrol would save you more money in the long run because it burns slower and if you were using ethanol, you would have to stop more often than you would usually. Argument 3: Although ethanol is said to be better for the environment, ethanol doesn’t really yield the most energy content then petrol does. Energy density is the amount of energy that can be stored in a given mass of a substance or system. The higher the energy density of a system or material, the greater the amount of energy stored in its mass. Energy content of Petrol 2C8H18 (l) + 25O2 (g) → 16CO2 (g) + 18H2O (g) ΔH= en (break reaction) – en (form product) = (2× (7×346 + 18×414) + 25×498) - (16× (2×804) + 18× (2×463) = - 10198 KJ/mol -5099 KJ/mol is for petrol that has been calculated to one mol because the top equation is calculated in two mol Energy content of Ethanol CH3CH2OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O(g) ΔH= en (break reaction) – en (form