AP Chemistry Unit 6 Thermodynamics

Front

What is thermodynamics?

Back

Thermodynamics is the branch of physical science that deals with the relationships between heat and other forms of energy.

Front

Define exothermic reaction.

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings.

Front

Define endothermic reaction.

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

Front

What does the first law of thermodynamics state?

Back

The first law of thermodynamics states that energy cannot be created or destroyed, only transformed or transferred.

Front

What is enthalpy?

Back

Enthalpy is a measure of the total energy of a thermodynamic system, including internal energy and the energy required to make room for it by displacing its environment.

Front

What is the significance of a negative enthalpy change?

Back

A negative enthalpy change indicates that a reaction is exothermic, meaning it releases heat.

Front

What is the significance of a positive enthalpy change?

Back

A positive enthalpy change indicates that a reaction is endothermic, meaning it absorbs heat.

Front

What is activation energy?

Back

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

Front

What is the relationship between activation energy and reaction rate?

Back

Higher activation energy generally results in a slower reaction rate, while lower activation energy leads to a faster reaction rate.

Front

What is a calorimeter?

Back

A calorimeter is a device used to measure the amount of heat involved in a chemical reaction or other processes.