What is energy transformation?

The process of converting energy from one type to another

The process of creating energy from nothing

The movement of energy from one location to another

Which of the following is NOT an example of energy transformation?

A battery losing charge without use

According to the concept of energy transformation, what must all types of energy use involve?

Conversion to electrical energy

What does the "system" refer to in a chemical context?

The specific area where chemical reactions occur and bonds are formed or broken

The entire universe except the reaction area

Any laboratory equipment used during experiments

The external environment affecting the reaction

Which of the following is considered part of the "surroundings" in a chemical experiment?

The beaker containing the reactants

The chemical bonds being broken within the reaction

The bonds forming in the reaction system

The chemical reactions themselves

When measuring temperature changes during a chemical reaction, what are we actually measuring?

The temperature of the surroundings only

The temperature of the system only

The temperature of both the system and the surroundings

The temperature of the laboratory

What is an endothermic process?

B) A process where the system gains heat energy from the surroundings.

A) A process where the system loses heat energy to the surroundings.

C) A process where the temperature of the system remains constant.

D) A process where the system converts mechanical energy into heat energy.

What happens in an exothermic process?

B) The system loses heat energy to the surroundings.

A) The system gains heat energy from the surroundings.

C) The system absorbs light energy from the surroundings.

D) The system produces electrical energy.

What does the term "Enthalpy" describe in chemical reactions?

The temperature change of the reaction

Which of the following examples is the endothermic reaction?

N₂(g) + 2 NO(g) → 2 N₂O(g), ΔH = 73.8 kJ/mol_rxn

CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(l), ΔH = -890.1 kJ/mol_rxn

2 H₂(g) + O₂(g) → 2 H₂O(g), ΔH = -241.8 kJ/mol_rxn

C(s) + O₂(g) → CO₂(g), ΔH = -393.5 kJ/mol_rxn

Which of the following chemical reactions is an example of an exothermic reaction?

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g), ΔH = -802 kJ

S(s) + O₂(g) → SO₂(g), ΔH = -296.0 kJ

C₂H₅OH → 2C + 3H₂ + 0.5O₂, ΔH = 228 kJ/mol

What occurs when two systems of different temperatures come into contact?

Energy is transferred from the hotter system to the cooler one until their temperatures are equal.

They remain at their initial temperatures.

Energy is transferred from the cooler system to the hotter one.

What does the peak of the curve in an endothermic potential energy diagram represent?

The activation energy needed for the reaction

The lowest energy state of the reactants

The total energy released by the reaction

The final energy state of the products

Which diagram typically shows a higher initial energy state before the peak?

Both show the same initial energy state

Neither diagram shows energy states

What characteristic of the exothermic potential energy diagram indicates that energy is released in the reaction?

The final state is lower than the initial state

The peak is higher than the initial state

The curve is below the initial state throughout

The curve returns to the initial state

What is the primary role of catalysts in a chemical reaction?

To lower the activation energy of the reaction without being consumed

To increase the activation energy of the reaction

To be consumed completely during the reaction

Refer to the diagram. What does the orange line represent in the energy diagram?

Energy path of the reaction with a catalyst

Energy path of the reaction without a catalyst

Total energy absorbed by the catalyst

Difference in energy between reactants and products

Thermochemistry

10th Grade

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Practice Problem

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Hard

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NGSS

HS-PS1-4, HS-PS3-4, HS-PS3-2

Standards-aligned

Alyssa Harris

Used 1+ times

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35 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is thermodynamics primarily concerned with?

The study of matter only

The study of energy and its transformations

The study of the universe

The study of plants and light bulbs

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the first law of thermodynamics state about energy?

Energy can be created and destroyed.

Energy can only be transferred or changed from one form to another.

Energy remains constant and cannot be used for work.

Energy can be stored indefinitely without any loss.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is another name for the first law of thermodynamics?

Law of Energy Dissipation

Law of Energy Conservation

Law of Energy Expansion

Law of Energy Destruction

Tags

NGSS.HS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of potential energy is stored in the nucleus of atoms?

Chemical

Elastic

Nuclear

Gravitational

Tags

NGSS.HS-PS1-8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of kinetic energy is associated with the movement of atoms or molecules?

Radiant

Thermal

Mechanical

Electrical

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gravitational energy is stored based on what aspect of an object?

Chemical composition

Height

Mass

Speed

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of energy is delivered by charged particles?

Mechanical

Nuclear

Thermal

Electrical

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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Thermochemistry

35 questions

What is thermodynamics primarily concerned with?

What does the first law of thermodynamics state about energy?

What is another name for the first law of thermodynamics?

What type of potential energy is stored in the nucleus of atoms?

Which type of kinetic energy is associated with the movement of atoms or molecules?

Gravitational energy is stored based on what aspect of an object?

What type of energy is delivered by charged particles?

Which type of kinetic energy travels in waves?

What is energy transformation?

Which of the following is NOT an example of energy transformation?

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