CM8001

a) Exothermic – Heat is released
b) Endothermic – Heat it absorbed
c) Endothermic – Heat is absorbed

Reactant have weaker bonds thus less energy is required to react. Product have stronger bonds, therefore gives large amount of energy.

Heat is the total energy of an object while temperature is the average energy for each particle in that object.
Example 1: An iceberg has more heat energy than a cup of boiling water since there are more particles in an iceberg.
Example 2: Temperature of a small cup of water can be the same as he temperature of a large tub of water but the large tub of water contains more molecules thus have more heat energy.

a)Knocking characteristics of 98% isooctane and 2% heptane
b)Not enough information about it.