Front

What is the definition of Enthalpy?

Back

Enthalpy is the total energy stored in the chemical bonds of a substance, often represented as 'H'.

Front

In a chemical reaction, where is the energy typically found if the reaction is exothermic?

Back

The energy will be on the product side.

Front

What does a positive ΔH value indicate about a reaction?

Back

A positive ΔH value indicates that the reaction is endothermic.

Front

How do you calculate the Enthalpy change (ΔH) of a reaction?

Back

ΔH = ΔH_products - ΔH_reactants.

Front

What type of reaction is represented by the equation: PCl3 (s) + Cl2 (g) --> PCl5 (s) + energy?

Back

This reaction is exothermic.

Front

What is the significance of the term 'exothermic' in a chemical reaction?

Back

Exothermic refers to a reaction that releases energy, usually in the form of heat.

Front

What is the significance of the term 'endothermic' in a chemical reaction?

Back

Endothermic refers to a reaction that absorbs energy from its surroundings.

Front

What happens to the temperature of the surroundings during an exothermic reaction?

Back

The temperature of the surroundings increases.

Front

What happens to the temperature of the surroundings during an endothermic reaction?

Back

The temperature of the surroundings decreases.

Front

In terms of energy, what occurs during an endothermic reaction?

Back

Energy is absorbed from the surroundings.