Define the following terms:

Question

Bond energy –

Endothermic –

Exothermic –

Enthalpy –

Answer 1

Bond energy refers to the amount of energy required to break a chemical bond and separate the atoms. It is usually expressed in terms of kilojoules per mole (kJ/mol).

Endothermic refers to a process or reaction that absorbs heat energy from the surroundings. In an endothermic reaction, the products have higher energy than the reactants, and heat is taken in to make up for the energy difference.

Exothermic, on the other hand, refers to a process or reaction that releases heat energy into the surroundings. In an exothermic reaction, the products have lower energy than the reactants, and heat is released to balance the energy difference.

Enthalpy is a thermodynamic property that represents the total energy of a system. It includes the internal energy of the system and the work done by or on the system. Enthalpy is commonly used to measure the heat flow of a process at constant pressure. It is denoted by the symbol H and measured in joules (J) or kilojoules (kJ).