The enthalpies of reaction of a carefully prepared and characterized specimen of lithium nitride, Li3N, with H2O and with HCl(aq) were found to be −(581.62±1.42) kJ mol−1 [−(139.01±0.34) kcalth mol−1] and −(803.50±1.26) kJ mol−1 [−(192.04±0.30) kcalth mol−...
The enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the enthalpy change if 1.62 g H2(g) reacts with 9.21g O2(g) to form H2O(l)? Please give detailed resolution. Given that the enthalpy of the reactants (as written in the balanced ...
化學加成律 addition law of thermochemistry。其實不只反應熱遵循黑斯定律,所有伴隨化學反 應所發生的能量變化都遵守黑斯定律,自由能以及亂度也都可以相加減。 標準生成熱 standard heat of formation 由於實驗只能測量熱能變化量,無法測量某個物質的熱含量,所以必須有一個公定的基 準來作參照。化學家們約定,...
由上面這個例子我們可以看出,黑斯定律允許熱化學反應式相加減,所以黑斯定律也稱作熱化學加成律additionlawofthermochemistry。其實不只反應熱遵循黑斯定律,所有伴隨化學反應所發生的能量變化都遵守黑斯定律,自由能以及亂度也都可以相加減。 標準生成熱standardheatofformation ...
Use Hess's law to calculate the enthalpy change for the reaction Cu(H2O)4(en)2+ (aq) + en (aq) --> Cu(H2O)2(en)2+(aq) + 2H2O(l) Compare that enthaly change to the enthalpy change for the reaction Cu( Use Hess's Law and a table of heats of ...