Potential Energy diagrams

Front

What is Potential Energy?

Back

Potential Energy is the energy stored in an object due to its position or configuration. It can be gravitational, elastic, or chemical.

Front

What does ΔH represent in a chemical reaction?

Back

ΔH represents the change in enthalpy, which indicates the heat content of a system during a reaction.

Front

What is the sign of ΔH for all endothermic reactions?

Back

Positive

Front

What is the sign of ΔH for all exothermic reactions?

Back

Negative

Front

What does a Potential Energy diagram illustrate?

Back

A Potential Energy diagram illustrates the energy changes during a chemical reaction, showing the energy of reactants, products, and the activation energy.

Front

What letter represents the energy of the products in a Potential Energy diagram?

Back

D

Front

What is an endothermic reaction?

Back

An endothermic reaction is a process that absorbs heat from its surroundings, resulting in a positive ΔH.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a process that releases heat to its surroundings, resulting in a negative ΔH.

Front

Which of these processes is always exothermic? A. evaporation, B. burning, C. insulation, D. melting

Back

B. burning

Front

What is activation energy?

Back

Activation energy is the minimum energy required for a chemical reaction to occur.