Front

What is bond energy?

Back

Bond energy is the amount of energy required to break one mole of a bond in a gaseous substance, resulting in the separation of the atoms.

Front

What does a negative ΔH value indicate in a chemical reaction?

Back

A negative ΔH value indicates that the reaction is exothermic, meaning energy is released during the reaction.

Front

What does a positive ΔH value indicate in a chemical reaction?

Back

A positive ΔH value indicates that the reaction is endothermic, meaning energy is absorbed during the reaction.

Front

What happens to energy when bonds are broken?

Back

Energy is required to break bonds, meaning energy is absorbed from the surroundings.

Front

What happens to energy when new bonds are formed?

Back

Energy is released from the system when new bonds are formed.

Front

What is the relationship between bond strength and bond energy?

Back

Stronger bonds have higher bond energy, meaning more energy is required to break them.

Front

How is bond energy related to the stability of a molecule?

Back

Higher bond energy generally indicates greater stability of a molecule, as more energy is required to break its bonds.

Front

What is the significance of bond energy in chemical reactions?

Back

Bond energy helps predict whether a reaction will be exothermic or endothermic based on the energy changes during bond breaking and forming.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to the surroundings.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from the surroundings, resulting in a decrease in temperature.