3.
下面均是正丁烷与氧气反应的热化学方程式(25℃、101kPa):
①C
4H
10(g)+
![](https://www.ebk.net.cn/tikuimages/9/2017/600/shoutiniao94/5526f6715ea31398010b981f5b91a221.png)
O
2(g)═4CO
2(g)+5H
2O(l);△H=﹣2 878kJ•mol
﹣1②C
4H
10(g)+
![](https://www.ebk.net.cn/tikuimages/9/2017/600/shoutiniao94/5526f6715ea31398010b981f5b91a221.png)
O
2(g)═4CO
2(g)+5H
2O(g);△H=﹣2 658kJ•mol
﹣1③C
4H
10(g)+
![](https://www.ebk.net.cn/tikuimages/9/2017/600/shoutiniao65/7b9a75e4bb77ea0d3396a93062815d1a.png)
O
2(g)═4CO(g)+5H
2O(l);△H=﹣1 746kJ•mol
﹣1④C
4H
10(g)+
![](https://www.ebk.net.cn/tikuimages/9/2017/600/shoutiniao65/7b9a75e4bb77ea0d3396a93062815d1a.png)
O
2(g)═4CO(g)+5H
2O(g);△H=﹣1 526kJ•mol
﹣1由此判断,正丁烷的燃烧热为( )