Heat Energy Exam # 6- Study Guide

Analyze the diagram.

Which statement best explains why the reaction in the diagram is exothermic?

• The potential energy of the reactants is more than the potential energy of the products.

• Potential energy is not conserved.

• More heat is absorbed in the reaction.

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

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

Analyze the diagram.

What is the potential energy value of the reactants?

• 150 kJ

• 50 kJ

• 350 kJ

• 200 kJ

Tags

NGSS.HS-PS1-4

Analyze the diagram.

Using ΔH = ΔH_products - ΔH_reactants, calculate the Heat of Reaction (ΔH).

• + 50 kJ

• + 150 kJ

• - 50 kJ

• - 150 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What does the Law of Conservation of Energy state?

• Energy cannot be transferred from one object to another object.

• Energy can be created or destroyed, but it cannot be transformed from one form to another.

• Energy can be created or destroyed.

• Energy cannot be created or destroyed, but it can be transformed from one form to another.

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A change occurs that raises the temperature of the container in which it happens. What is the best term to describe the change. (The container is the surroundings and the metal is the system.)

• condensation

• endothermic

• exothermic

• mechanical

Tags

NGSS.HS-PS3-4

During an exothermic change, energy is ________ which _________ the surroundings.

• absorbed, cools

• absorbed, warms

• released, cools

• released, warms

Tags

NGSS.HS-PS3-4

During an endothermic change, energy is ________ which _________ the surroundings.

• absorbed, cools

• absorbed, warms

• released, cools

• released, warms

Tags

NGSS.HS-PS3-4

The first law of thermodynamics, or the law of conservation of energy, states that energy is neither __________ nor destroyed. Therefore, the energy absorbed must the ____________ the energy released during these changes.

• created, equal to

• created, greater than

• created, less than

• transformed, less than

• transformed, equal to

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

Analyze the graph.

Between which points is heat energy released?

• E to F

• B to C

• E to D

• D to E

Tags

NGSS.HS-PS3-4

Analyze the graph.

What phase change occurs from point B to point C?

• sublimiation

• melting

• freezing

• evaporation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4