hce_kmu
114年
物理及化學
第 66 題
Methanol, a high-octane fuel, is extensively utilized in high-performance racing engines due to its favorable combustion characteristics. To investigate its thermodynamic properties, we can calculate the change in Gibbs free energy ($\Delta$G$^{\circ}$) associated with the combustion reaction of methanol when employed as an energy source. What is the $\Delta$G$^{\circ}$?
$\Delta$G$^{\circ}_f$ (CO$_2$) = -394 kJ, $\Delta$G$^{\circ}_f$ (H$_2$O) = -299 kJ, $\Delta$G$^{\circ}_f$ (CH$_3$OH) = -163 kJ
$\Delta$G$^{\circ}_f$ (CO$_2$) = -394 kJ, $\Delta$G$^{\circ}_f$ (H$_2$O) = -299 kJ, $\Delta$G$^{\circ}_f$ (CH$_3$OH) = -163 kJ
- A -1358 kJ/mol
- B -1558 kJ/mol
- C -1658 kJ/mol
- D -1758 kJ/mol
- E -1858 kJ/mol
思路引導 VIP
若要評估一個化學反應是否能自發進行，我們通常會參考該反應的能量變化。假設你現在手中擁有所有參與反應物質的『標準生成能量』數據，你會如何利用這些數據來描述整個反應過程的能量落差？在結合這些數據時，反應物與產物在化學計量上的數量（係數）會如何影響最終的計算結果呢？