A、H<sub>2sub>O(l,268K,100kPa)→H<sub>2sub>O(s,268K,100kPa) B、在298 K,100kPa时,H<sub>2sub>(g)+Cl<sub>2sub>(g)=2HCl(g) C、在298 K,100kPa时,一定量的NaCl(s)溶于水中 D、H<sub>2sub>O(l,373K,100kPa)→H<sub>2sub>O(g,373K,100kPa)
A、设用两种途径得到NaCl(s),用盖斯定律分别求算△<sub>fsub>H<sup>θsup><sub>msub>NaCl(s),并作比较。(温度为298K)src="https://img.ppkao.com/2019-04/wangjing/2019041417110676179.jpg" />
src="https://img.ppkao.com/2019-04/wangjing/2019041417111553079.jpg" />
A、已知298.2K时,NaCl(s)、H<sub>2sub>SO<sub>4sub>(l)、Na<sub>2sub>SO<sub>4sub> (s)和HC<sub>lsub>(g)的标准摩尔生成焓分别为-411、-811.3、-1383和-92.3 kJ·mol<sup>-1sup>,求下列反应的src="https://img.ppkao.com/2019-04/yuanhuijuan/2019041517091565373.jpg" />
2NaCl(s) + H<sub>2sub>SO<sub>4sub>(l) = Na<sub>2sub>SO<sub>4sub>(s) + 2HC<sub>lsub>(g)