LUI The enthalpy of atomization of ...
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LUI The enthalpy of atomization of PHz is 954 kJ mol-' and that of P2H4 is 1485 kJ mol What is the bond enthalpy of the P-P bond?

JEE/Engineering Exams
Chemistry
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( P M_{3} longrightarrow frac{1}{2} P_{2}+frac{3}{2} H_{2} ) ( 9 S 4=3(P-H) ) ( P_{2} H_{4} longrightarrow P_{2}+2 h_{2} ) ( 1485=4(P-H)+(P-P) ) ( 1485=4 times frac{954}{3}+(P-P) ) ( (P-P)=-1272+1985 ) ( =213 mathrm{KJ} )
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