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You wish to know the enthalpy change for the formation of liquid PCl3​ from the elements. P4​( s)+6Cl2​(g)→4PCl3​(l): Change in enthalpy =# kJ? The enthalpy change for the formation of PCl5​ from the elements can be determined experimentally, as can the enthalpy change for the reaction of PCl3​ (I) with more chlorine to give PCl5​(s): P4​( s)+10Cl2​( g)→4PCl5​( s)H=−1774.0 kJ/mol∗rxnPCl3​(l)+Cl2​(g)→PCl5​( s)H=−123.8 kJ/mol∗rxn​ Use these data to estimate the change in enthalpy for the first reaction, the formation for PCl3​ from its elements. \{answer looks like # kJ\}