From the following enthalpy changes, 2PCl3(l) → 2P(s) + 3Cl2(g) ∆H = -640 kJ
2P(s) + 5Cl2(g) → 2PCl5(s) ∆H = -886 kJ

calculate the value of ∆H for the reaction
PCl3(l) + Cl2(g) → PCl5(s) ∆H = ??

Tell me the iupac name of the following compounds:

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Why is the melting of ice a physical change ?