IGE Model: An Extension of the Ideal Gas Model to Include Chemical Composition as Part of the Equilibrium State

<table>Standard state molar enthalpy of reaction <svg height="11.77875" id="M86" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 30.643749 11.77875" width="30.643749" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,11.77875)">
<text transform="matrix(1,0,0,-1,0.498,0.498)">
<tspan style="font-size: 12.50px; " x="0" y="0">Δ</tspan>
<tspan style="font-size: 12.50px; " x="9.0272522" y="0">𝐻</tspan>
</text>
<text transform="matrix(1,0,0,-1,20.441,5.499)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
</text>
</g>
</svg> versus temperature for reaction (<a href="https://static.hindawi.com/articles/jther/volume-2012/870631/figures/#EEq11">11</a>). <svg height="12.185" id="M87" style="vertical-align:-0.30096pt" version="1.1" viewbox="0 0 57.846249 12.185" width="57.846249" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,12.185)">
<text transform="matrix(1,0,0,-1,0.498,0.798)">
<tspan style="font-size: 12.50px; " x="0" y="0">Δ</tspan>
<tspan style="font-size: 12.50px; " x="9.0272522" y="0">𝐻</tspan>
</text>
<text transform="matrix(1,0,0,-1,20.441,5.799)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
</text>
<text transform="matrix(1,0,0,-1,27.49,0.798)">
<tspan style="font-size: 12.50px; " x="0" y="0">&gt;</tspan>
<tspan style="font-size: 12.50px; " x="12.028002" y="0">0</tspan>
</text>
</g>
</svg> which implies the reaction is endothermic.</table>

Journal of Thermodynamics

fig5

Figure 5

Figure 5: IGE Model: An Extension of the Ideal Gas Model to Include Chemical Composition as Part of the Equilibrium State 