Question- White Phosphorus, P4, combusts in oxygen, O2, to produce heat, light, and P4O10 according the following reaction-
(P_{4} + 5O_{2} --> P_{4}O_{10})
If 67.2 of P4 are burned, 1620kj of energy is evolved.
1) What is the molar enthalpy of combustion of P4 if the process is carried out at constant pressure?
Provide your answer in scientific notation