Ch. 17 - Chemical ThermodynamicsSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

First Law of Thermodynamics

See all sections
Conservation of Energy

Concept #1: First Law of Thermodynamics Intro

Concept #2: First Law of Thermodynamics

Additional Problems
What is the first law of thermodynamics? (circle one) The energy of the universe is conserved. The speed of a spontaneous process is determined by the activation energy. Mass and energy of the universe is conserved.
Which statement would be the best interpretation of the First Law of Thermodynamics? 1. The total amount of energy in the universe is increasing. 2. The total amount of energy in the universe is constant.  3. The total amount of matter in the universe is constant. 4. The total amount of entropy in the universe is increasing.
Which statement(s) is/are true regarding the first law of thermodynamics? I) Energy can be converted from one form to another, but the total amount of energy is always conserved. II) The first law of thermodynamics defines entropy. III) The internal energy of the system and surroundings could both increase.   A) I only B) III only C) both II and III D) both I and III E) all are true
The First Law of Thermodynamics tells us that:  a. energy must be transferred during a chemical reaction. b. enthalpies of formation for elements must be zero. c. all collisions of gas molecules are elastic. d. if something loses energy, something else must gain that same amount of energy. e. heat always flows from a hot body to a cold body.
The ____ law of thermodynamic states the energy is conserved in chemical processes. Second First Third Zero None of the above
Imagine that you are climbing a mountain. (a) Is the distance you travel to the top a state function? Why or why not?
(a) State the first law of thermodynamics.
The law of ________ states that energy can be neither created nor destroyed.A) kinetic energyB) potential energyC) the conservation of energyD) thermochemistry
(a) What is meant by the term state function?
Which of the following is a statement of the first law of thermodynamics?A) Ek = 1/2mv2B) A negative ΔH corresponds to an exothermic process.C) ΔE = Efinal - EinitialD) Energy lost by the system must be gained by the surroundings.E) 1 cal = 4.184 J (exactly) 
Select the correct statement of the first law of thermodynamics. a) At a temperature of 0 K the entropy of a pure crystalline solid isb) In a spontaneous process, the entropy of the universe increasesc) Energy is conserved, or, mathematically, delta E = q + w