Enthalpy and entropy - Study guides, Class notes & Summaries

ACS Physical Chemistry Thermochemistry Study Guide |Question and Answer| 100% Correct What is the third law of thermodynamics? *Ans* The entropy of a perfect crystal is zero. What is the second law of thermodynamics? *Ans* As a whole, the universe always tends towards increasing entropy. What is the relationship between number of microstates and entropy? *Ans* More microstates = higher entropy What is the relationship between temperature and entropy? *Ans* Temperature increases, en...

ACS Physical Chemistry Thermochemistry Study Guide |100% Correct| What is the third law of thermodynamics? *Ans* The entropy of a perfect crystal is zero. What is the second law of thermodynamics? *Ans* As a whole, the universe always tends towards increasing entropy. What is the relationship between number of microstates and entropy? *Ans* More microstates = higher entropy What is the relationship between temperature and entropy? *Ans* Temperature increases, entropy increases (dir...

Energy is neither ____ or ____. It simply ________. Created, destroyed, changes form What are the 2 types of energy? Kinetic, Potential Kinetic Energy (def, @molecular lvl) Energy of Motion; Thermal Energy (heat production through consistent motion) Potential Energy (def, @molecular lvl) Energy of position/configuration, stored energy; Chemical energy is stored Where do electrons have the greatest potential energy? In the outermost electron shells Free energy Amount of energy available to d...

CHEM191 Module 2 Exam Questions With 100% Correct Answers What is kinetic energy? - answerenergy of motion what is potential energy? - answerenergy of relative position 0 chemical bonds act as a store of potential energy what happens in terms of heat when a chemical reaction happens? - answerheat (q) is either absorbed or released by the reaction. what is enthalpy? - answerthe heat of reaction measured under conditions of constant pressure. how can the change in enthalpy be determined? ...

In a barometer: if the external air force outweighs the weight of the mercury, then the column ______. If the external air force is less than the weight of the mercury, the column _____. correct answers rises, drops proteins correct answers amides are the functional groups present in: fructose-6-phosphate, glyceraldehyde-3-phosphate, NADPH, ribose-5-phosphate correct answers list all the products of the PPP: going down periodic table due to greater size and polarizability correct answer...

MCAT General Chemistry (Princeton Review) Questions and Answers | Latest Update | 2024/2025 | Already Passed What is the role of a Lewis acid and a Lewis base in a chemical reaction? A Lewis acid is an electron pair acceptor, while a Lewis base is an electron pair donor. They interact to form a coordinate covalent bond where the base donates an electron pair to the acid. How does the concept of bond enthalpy relate to the strength of a chemical bond? Bond enthalpy (or bond dissoci...

CHEM191 Module 2 Exam Questions With 100% Correct Answers What is kinetic energy? - answerenergy of motion what is potential energy? - answerenergy of relative position 0 chemical bonds act as a store of potential energy what happens in terms of heat when a chemical reaction happens? - answerheat (q) is either absorbed or released by the reaction. what is enthalpy? - answerthe heat of reaction measured under conditions of constant pressure. how can the change in enthalpy be determined? ...

isolated system correct answers no exchange of energy or matter (thermos, ice chest) closed system correct answers only energy is allowed to be exchanged (chicken egg, unopened soda, stoppered reaction flask) open system correct answers both energy and matter are allowed to exchange (human, cell, open reaction flask, opened soda) what is the only way to change internal energy in a closed system? correct answers heat or work first law of thermodynamics correct answers the energy of ...

Which species will have the greatest absolute entropy at 25°C? Select one: A. C4H10(g) B. H2O(l) C. C2H5OH(l) D. C2H2(g) E. Ne(g) Which is a statement of the second law of thermodynamics? Select one: A. The energy of the universe is constant. B. The energy of the universe is decreasing. C. The entropy of the universe is increasing. D. The enthalpy of the universe is constant. E. The entropy of the universe is constant. My Account Question 3 Correct 5.00 points out of 5.00 Que...

Thermodynamics the study of energy transformations thermochemistry applied field to chemical reactions energy the ability to do work or transfer heat work energy used to cause an object that has mass to move heat energy used to cause the temperature of an object to change enthalpy the heat energy absorbed or released by a system during a constant-pressure process deltaH entropy A measure of the dispersion of energy or randomness in a system ...