Chemical Reactions and Energy Concepts

What type of chemical is responsible for most of the smells we experience?

• Inorganic

• Organic

• Metallic

• Noble gases

A chemical reaction that releases heat, like a hot pack, is called what?

• Endothermic

• Isothermic

• Exothermic

• Hyperthermic

What term describes the natural tendency of systems to move towards more disorder or chaos?

• Enthalpy

• Kinetics

• Entropy

• Thermodynamics

What does a negative value for Gibbs Free Energy (ΔG) indicate about a chemical reaction?

• It requires energy to happen

• It is non-spontaneous

• It is spontaneous

• It is at equilibrium

What type of chemical reaction needs heat to flow in so it can make products?

• Exothermic

• Endothermic

• Catalytic

• Reversible

What is the energy required to get a chemical reaction started called?

• Product energy

• Reactant energy

• Activation energy

• Equilibrium energy

In a multi-step reaction, what are the stable points between reaction steps called, which are represented as "valleys" in an energy diagram?

• Transition states

• Reactants

• Products

• Intermediates

What substance speeds up a chemical reaction by lowering its activation energy without being used up?

• Reactant

• Product

• Catalyst

• Inhibitor