Copy of Skill Check #1.2 (Unit 1 Investigation 1 Experience 2) (7/30/2025)

Obavezno

2

If the chemical reaction AB + CD → AD + BC releases heat, what is true of the stored energy of the reactants and products?

The energy of the reactants is the same as the energy of the products.

The energy of the reactants is higher than the energy of the products.

The energy of the reactants is lower than the energy of the products.

The bonds do not have energy; the atoms release heat.

Obavezno

2

Energy is absorbed during an endothermic reaction.

An endothermic reaction reduces the overall kinetic energy of the molecules.

An endothermic reaction increases the overall kinetic energy of the molecules.

Energy is released during an endothermic reaction.

Obavezno

2

The burning of the wood absorbs energy from its surroundings. Heat is transferred from your body to the campfire.

Heat does not flow between the campfire and your body, as thermal equilibrium already has been achieved.

The burning of the wood releases energy to its surroundings. Heat is transferred from the campfire to your body.

The burning of the wood releases energy to its surroundings. Heat is transferred from your body to the campfire.

Obavezno

2

physical, heat and light

physical, carbon dioxide and water

chemical, heat and light

chemical, carbon dioxide and water

Obavezno

2

Exothermic

Endothermic

Non-energetic

Neutralization