Exploring Energy Changes in Chemical Reactions

What study focuses on the energy involved in chemical reactions?

• Physics

• Geology

• Biology

• Thermochemistry

What type of reaction involves a net release of energy to the surroundings?

• Endothermic

• Exothermic

• Hypothermic

• Isotonic

In which type of reaction is energy absorbed from the surroundings?

• Exothermic

• Hyperthermic

• Ectothermic

• Endothermic

Where is energy placed in the equation for an endothermic process?

• It is not included

• As a catalyst

• On the reactant side

• On the product side

How is energy represented in an exothermic reaction's equation?

• As a separate component

• It is not represented

• On the reactant side

• On the product side

What does a negative Delta H signify in a thermochemical equation?

• Energy absorption

• Temperature decrease

• Energy release

• No change in energy

What is enthalpy a measure of in a chemical process?

• Mass

• Pressure

• Volume

• Energy or heat

What does an enthalpy diagram visually represent?

• The pressure changes in a reaction

• The volume changes in a reaction

• The energy levels of reactants and products

• The mass of reactants and products

What signifies an endothermic reaction in an enthalpy diagram?

• No change in enthalpy

• Products have higher enthalpy than reactants

• Constant decrease in enthalpy

• Reactants have higher enthalpy than products

Why is it important to quantify energy in chemical reactions?

• To determine energy release or absorption

• To measure reaction pressure

• To understand reaction color

• To predict reaction speed