What is the relationship between entropy and heat capacity?
May 4, 2020 · Intutively, the way to think about this is that the entropy is determined by how the energy levels are populated; $\frac{C_p(T)}{T}$ at any given temperature tells us the ways in which the existing populations are able to change as the temperature is increased; and the integral of $\frac{C_p(T)}{T}$ gives us the entropy by summing up these changes.
Molar entropy of vaporization - Chemistry Stack Exchange
Aug 15, 2018 · If a substance has a molar heat of vaporization of $\pu{3.05\times10^4J/mol}$ and a normal boiling temperature of $\pu{80.0^\circ C}$, what is the value of its molar entropy of vaporization $\Delta...
What is the precise definition of standard molar entropy?
Jan 20, 2020 · Any calculation of standard molar entropy requires determining the initial reversible heat flow starting at $\pu{0 K}$, at standard pressure: $$ S^\circ(\pu{298.15 K}) = \int_{0}^{\pu{298.15 K}}\frac{\mathrm{đ}q_\mathrm{rev}}{T} $$ The initial part of this integral (starting at $\pu{0 K}$) can't be done experimentally, and thus has to be based ...
Question: Choose the compound with the largest standard molar …
Choose the compound with the largest standard molar entropy, S∘(298.15 K). Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on.
Why is it that increasing the molar mass generally increases the …
Apr 14, 2015 · Increasing the molar mass of that specific element increases the entropy. I understand the first one, but I can't grasp the second one. Because naturally you would think that $\ce{H2}$ would have a higher entropy than $\ce{Ne}$ because one mole of it is generally lighter.
What does it mean that the standard molar entropy value is the …
Jul 9, 2022 · The wording of the cited paragraph is confusing, but it does not say that "the standard molar entropy value is the amount of energy that a substance must have to exist at a certain temperature" (as claimed in the question). In fact the author says specifically that this is …
thermodynamics - Why does graphite have a higher standard …
Dec 6, 2023 · It is known that graphite (5.7 J/K mol) has a higher standard molar entropy than diamond (2.4 J/K mol) (data from Physical Chemistry by Atkins). I understand that this must be due to the structural differences between the two allotropes, however I have not been able to find any textbooks or scholarly sources addressing them.
Why does ozone have higher entropy than oxygen?
Sep 14, 2018 · You are mixing up two different quantities (entropy of reaction, and molar entropies of the two gases involved in the reaction) and either your text book is in error, or you have misread it somehow. For that reaction, as written, the formation of ozone from oxygen, $\Delta G$ is positive and $\Delta S$ is negative (the opposite of what you ...
Solved Which of the following has the largest standard molar
Which of the following has the largest standard molar entropy, Sº (298.15 K)? A) He(g) B) H₂(g) C) NaCl(aq) D) KBr(s) E) Hg(1) What will the sign on AS be for the following reaction and why? 2 Mg (s) + O₂(g) → 2 MgO (s) A) Positive, because there is a solid as a product. B) Positive, because there are more moles of reactant than product.
Why is the molar entropy of hexane lower than that of butane?
Jul 30, 2020 · Entropy is dependent on the complexity of the molecule. Due to this, I expected entropy to increase as the complexity of the molecule increased. According to p 918 of Atkins' Physical Chemistry (9th ed.), I noticed that the standard molar entropy of n-hexane at is $\pu{204.3 J mol-1 K-1}$, whereas that for n-butane is $\pu{310.23 J mol-1 K-1}$.