\(\displaystyle \Delta S = C_p · \ln \left(\frac{T_f}{T_i}\right)
- NR · \ln \left(\frac{P_f}{P_i}\right) \Rightarrow \Delta
S = C_p · \ln \left(\frac{T_f}{T_i}\right) + R · \ln
2 \qquad (A) \)

<script type="text/x-mathjax-config">
MathJax.Hub.Config({"HTML-CSS": { preferredFont: "TeX", availableFonts: ["STIX","TeX"], linebreaks: { automatic:true }, EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50) },
tex2jax: { inlineMath: [ ["$", "$"], ["\\(","\\)"] ], displayMath: [ ["$$","$$"], ["\[", "\]"] ], processEscapes: true, ignoreClass: "tex2jax_ignore|dno" },
TeX: { noUndefined: { attributes: { mathcolor: "red", mathbackground: "#FFEEEE", mathsize: "90%" } }, Macros: { href: "{}" } },
messageStyle: "none"
});
</script>
<script src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML-full"></script>