Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

8. Thermochemistry

First Law of Thermodynamics

General Chemistry

8. Thermochemistry

First Law of Thermodynamics

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Multiple Choice

Which is a correct statement of the law of conservation of energy?

Energy is neither lost nor gained by an object.

Energy is stored as matter.

The energy lost by a system is gained by the surroundings.

The energy gained by a system is also gained by the surroundings.

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Verified step by step guidance

Understand the law of conservation of energy: It states that energy cannot be created or destroyed, only transformed from one form to another or transferred between systems and surroundings.

Analyze the given statements: The first statement suggests energy is neither lost nor gained, which is partially correct but lacks the context of energy transfer.

Consider the second statement: Energy stored as matter is related to mass-energy equivalence (E=mc^2), not directly to the conservation of energy in typical chemical processes.

Evaluate the third statement: It correctly describes the conservation of energy in a closed system, where energy lost by the system is gained by the surroundings, maintaining the total energy constant.

Review the fourth statement: It incorrectly suggests that energy gained by a system is also gained by the surroundings, which contradicts the conservation principle as energy would be duplicated, not conserved.