CM8001

a) Endo Energy is released.
B) Endo Energy is absorbed to break the intermolecular bonds holding the molecules together.
C) Endo. Energy is absorbed to change the state from solid to liquid.

Bonds forming release energy and breaking of bonds create energy.
In order for a good explosion to occure, the bond strengths of product should be much greater than the bond strength of reactants. So, the reaction would be extremely exothermic.

Heat is the flow of energy(thermal) from a system of higher temperature to system of lower temperature.
Temperature is the measure of internal enegy of an object.

A) It has a higher resistance to cause knocking in a vehicle’s engine. Therefore less prone to preignition.
B) Oxygenates is a form of additives added to fuel to increase the octane rating. The average octane rating of fuel is 87-89. Therefore it is likely that oxygenates are added to increase octane rating.