2021 Huaihua Public Institution ReformsIn 2021, the focus of Huaihua City's organizational establishment was to complete the pilot reform of public welfare institutions in an all-round way. In the work, based on serving the...
Haotian Ji 3: Talisman Master's BookHe didn't quite understand the exact meaning of the phrase 'Haotian Ji 3: Talisman Array Master Accompanied by Books'. If he wanted to ask about the content of the book'...
Strange Corpse Fighter novel" The Corpse Fighter " was a suspense novel written by the author of the Dark Night Literature Network," The Bad Guy." There was also a novel called " The...
How to calculate the reaction mole change of the heat?以下是四种计算标准摩尔反应焓变的方法: 1. **利用标准摩尔生成焓计算**:标准摩尔生成焓是指定温度,标态时,由稳定单质生成一摩尔物质时的反应焓变。对于反应\(aA + bB = cC + dD\),标准摩尔反应焓变\(\Delta_{r}H_{m}^{\theta}=\sum_{i}v_{i}\Delta_{f}H_{m}^{\theta}(i)\),其中\(v_{i}\)是反应式中物质\(i\)的化学计量数(对于反应物\(v_{i}\)为负,对于生成物\(v_{i}\)为正),\(\Delta_{f}H_{m}^{\theta}(i)\)是物质\(i\)的标准摩尔生成焓。 2. **利用标准摩尔燃烧焓计算**:标准摩尔燃烧焓是指定温度,标态时,一摩尔的物质完全氧化时反应的焓变。对于反应\(aA + bB = cC + dD\),\(\Delta_{r}H_{m}^{\theta}=-\sum_{i}v_{i}\Delta_{c}H_{m}^{\theta}(i)\),其中\(v_{i}\)是反应式中物质\(i\)的化学计量数(对于反应物\(v_{i}\)为正,对于生成物\(v_{i}\)为负),\(\Delta_{c}H_{m}^{\theta}(i)\)是物质\(i\)的标准摩尔燃烧焓。 3. **根据等容过程计算**:在等容过程时,\(\Delta U = Q_{v}\),\(\Delta H=Q_{v}-p\Delta V\),\(\Delta_{r}H_{\theta m}\)表示在标准态下(100Kpa、298.15K),反应进度为1mol时的反应就称为标准摩尔焓变,用\(\Delta_{r}H_{\theta m}(T)\)表示。 4. **根据热化学方程式计算**:根据热化学方程式中给出的反应热\(\Delta H\)与反应进度的关系,确定标准摩尔反应焓变。反应焓变单位中的\(mol^{-1}\)是指每摩尔反应,即反应完成时参加反应的各物质的物质的量的数值与热化学方程式中各物质化学式前的系数相同,而不是指每摩尔物质。例如:\(H_{2}(g)+\frac{1}{2}O_{2}(g)=H_{2}O(l)\ \Delta...
Sun Jiajun MusclesAs a swimmer, Sun Jiajun had amazing muscle lines. From his fashion magazine photos, it could be seen that he had a healthy and handsome charm. His muscle mass and...
A love letter to the setting sunSunset, you are the most magnificent color in the sky. When you cross the western sea and leave your last salutation to the east, the whole world is enveloped in...
How good is Favors?Phevos was an American professional basketball player with a certain level of strength. In the 2010 draft, he was selected by the New jersey Nets (now the brooklyn nets) with...