OL U4 Zone 3

Front

What do thermochemical equations show?

Back

How much heat is absorbed or released during the reaction.

Front

What does ΔH mean?

Back

Enthalpy.

Front

What type of reaction is characterized by energy being absorbed?

Back

Endothermic.

Front

What is the state of carbon in the reaction C(s) + 2S(s) → CS₂(l)?

Back

Solid.

Front

Which equation determines the change in heat of a reaction?

Back

ΔH°rxn = Σn (ΔH°f) of products - Σn (ΔH°f) of reactants.

Front

What is an exothermic reaction?

Back

A reaction that releases energy in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is the significance of the enthalpy change (ΔH) in a reaction?

Back

It indicates whether a reaction is exothermic or endothermic.

Front

What is calorimetry?

Back

The measurement of heat changes in chemical reactions.

Front

What does the symbol 's' represent in a chemical equation?

Back

Solid state of a substance.