The and are 76 and 51 kcal

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

The

e_{P-H}

and

e_{P-P}

are 76 and 51 kcal

\text{mol}^{-1}

. The difference in the heat of atomisation for

\text{PH}_3

and

\text{P}_2\text{H}_4

in kcal

\text{mol}^{-1}

is: (1) 127 (2) 178 (3) 203 (4) 25