AP 6.1 Endothermic & Exothermic AP

Front

What are the units of ΔH_rxn?

Back

kJ/mol

Tags

NGSS.HS-PS1-4

Front

Why is the value of ΔH° for the dissolving of CaF₂ in water positive?

Back

Ca²⁺ ions have very strong ion-ion interactions with F^- ions in the crystal lattice.

Tags

NGSS.HS-PS1-4

Front

ΔH_rxn = ΔH_{_________________} − ΔH_{_________________}

Back

products, reactants

Tags

NGSS.HS-PS1-4

Front

On a potential energy diagram for an endothermic reaction, what is true about the potential energy of reactants and products?

Back

The potential energy of the reactants is less than the potential energy of the products.

Tags

NGSS.HS-PS1-4

Front

In an exothermic reaction, the sign of ΔH is ____ and the reaction feels ______.

Back

(-), hot

Front

Define an endothermic reaction.

Back

A reaction that absorbs heat from its surroundings, resulting in a positive ΔH.

Tags

NGSS.HS-PS1-4

Front

Define an exothermic reaction.

Back

A reaction that releases heat to its surroundings, resulting in a negative ΔH.

Tags

NGSS.HS-PS1-4

Front

What is the significance of ΔH in a chemical reaction?

Back

ΔH indicates the heat change during a reaction, helping to classify it as endothermic or exothermic.

Tags

NGSS.HS-PS1-4

Front

What happens to the temperature of the surroundings during an exothermic reaction?

Back

The temperature of the surroundings increases.

Tags

NGSS.HS-PS1-4

Front

What happens to the temperature of the surroundings during an endothermic reaction?

Back

The temperature of the surroundings decreases.

Tags

NGSS.HS-PS1-4