<div dir="ltr">Dear K C Bhamu,<div>To get the enthalpy and entropy at T>0 (and the zero-point energy which you haven't included yet) you need to perform a phonon calculation. </div><div>Best regards,</div><div>Michal Krompiec</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 18 Jan 2021 at 10:16, Dr. K. C. Bhamu <<a href="mailto:kcbhamu85@gmail.com">kcbhamu85@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default"><font size="4" face="georgia, serif">Dear QE Users,</font></div><div class="gmail_default"><font size="4" face="georgia, serif">[I am using QE_6.4 and 6.6!!]</font></div><div class="gmail_default"><font size="4" face="georgia, serif">I am looking for a QE based good reference and some advice for my work: dehydrogenation of a molecule (let's say it is C6H12).</font></div><div class="gmail_default"><font size="4" face="georgia, serif"><br></font></div><div class="gmail_default"><font size="4" face="georgia, serif">I am trying to calculate dehydrogenation enthalpy of this molecule. </font></div><div class="gmail_default"><font size="4" face="georgia, serif"><br></font></div><div class="gmail_default"><font size="4" face="georgia, serif">I have obtained my dehydrogenation reaction energy diagram for each step but that is at 0K and 0P.</font></div><div class="gmail_default"><font face="georgia, serif" size="4"><span style="color:rgb(32,33,36)">ΔG</span> = <span style="color:rgb(32,33,36)">ΔH </span>- T* <span style="color:rgb(32,33,36)">ΔS</span></font></div><div class="gmail_default"><font face="georgia, serif" size="4">In QE we have T=0, so <span style="color:rgb(32,33,36)">ΔG</span> = <span style="color:rgb(32,33,36)">ΔH</span>.<br></font></div><div class="gmail_default"><font size="4" face="georgia, serif"><br></font></div><div class="gmail_default"><font size="4" face="georgia, serif">Now I want to calculate the thermodynamic and activation parameters at standard (~25 °C, and 0.1MPa) and experimental conditions (~150 °C, and 7MPa) {Please seeTable 1,2 of [1] what I mean for it} with and without the solvent. </font></div><div class="gmail_default"><font size="4" face="georgia, serif"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4">How can I get these thermodynamic and activation parameters at some particular temperature and pressure?</font></div><div class="gmail_default"><font size="4" face="georgia, serif"><br></font></div><div class="gmail_default"><font size="4" face="georgia, serif">If I am wrong, then I need to use environ code [2] to include the solvent effect in my study. Right?</font></div><div class="gmail_default"><div class="gmail_default"><font size="4" face="georgia, serif">[1]. <a href="https://www.sciencedirect.com/science/article/pii/S0360319915005753#appsec1" target="_blank">https://www.sciencedirect.com/science/article/pii/S0360319915005753#appsec1</a></font></div><div class="gmail_default"></div></div><div class="gmail_default"><font face="georgia, serif" size="4">[2]. <a href="https://github.com/environ-developers/Environ/releases" target="_blank">https://github.com/environ-developers/Environ/releases</a><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4">If I missed something to explain my problem, I am sorry and I will share it if you suggest the missing information. </font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4">Any help will be appreciated.</font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4">Thank you very much</font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4">Regards</font></div><div class="gmail_default"><font face="georgia, serif" size="4">K C Bhamu</font></div><div class="gmail_default"><font face="georgia, serif" size="4">University of Ulsan</font></div><div class="gmail_default"><font face="georgia, serif" size="4">ROK</font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><font face="georgia, serif" size="4"><br></font></div><div class="gmail_default"><br></div></div>
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