求助~~
In which equation does the term "heat" represent heat of fusion ? ( 原题)
1) NaCl(s) + heat -------- NaCl(l)
2) NaOH(aq) + HCl(aq) --------NaCl(aq) + H2O + heat
3) H2O(l) +heat --------H2O(g)
4) H2O(l) +HCl(g) --------- H3O+ (l) + Cl- (aq) + heat
顺便问一下,为什么不能上图啊?
