You wish to know the enthalpy change for the formation of liquid PC13 from the elements. P4 (s) + 6 Cl₂(g) →4 PC13 () A, H* =? The enthalpy change for the formation of PC15 from the elements can be determined experimentally, as can the enthalpy change for the reaction of PC13 (4) with more chlorine to give PCL5 (s) P4 (s) + 10 Cl₂(g) → 4 PC15 (s) A₂H-1774.0 kJ/mol - rxn PC13 (4) + Cl₂ (g) → PC15 (s) A₂H-123.8 kJ/mol - rxn Use these data to calculate the enthalpy change for the formation of 1.70 mol of PC13 (4) from phosphorus and chlorine. Enthalpy change = kj

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You wish to know the enthalpy change for the formation of liquid PC13 from the elements.
P4 (8) +6 Cl₂ (g) → 4 PC13 (0) A, H' =?
The enthalpy change for the formation of PC15 from the elements can be determined experimentally, as can the enthalpy change for the reaction of PC13 (4) with more chlorine to give PCl; (s):
P4 (s) +10 Cl₂(g) → 4 PC15 (s)
A,H-1774.0 kJ/mol - rxn
PC13 (4) + Cl₂ (g) →→ PCl, (s)
A₂H-123.8 kJ/mol - rxn
Use these data to calculate the enthalpy change for the formation of 1.70 mol of PC13 (4) from phosphorus and chlorine.
Enthalpy change =
kj
Transcribed Image Text:You wish to know the enthalpy change for the formation of liquid PC13 from the elements. P4 (8) +6 Cl₂ (g) → 4 PC13 (0) A, H' =? The enthalpy change for the formation of PC15 from the elements can be determined experimentally, as can the enthalpy change for the reaction of PC13 (4) with more chlorine to give PCl; (s): P4 (s) +10 Cl₂(g) → 4 PC15 (s) A,H-1774.0 kJ/mol - rxn PC13 (4) + Cl₂ (g) →→ PCl, (s) A₂H-123.8 kJ/mol - rxn Use these data to calculate the enthalpy change for the formation of 1.70 mol of PC13 (4) from phosphorus and chlorine. Enthalpy change = kj
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