Ethylene burns with 50% excess air, both entering at 25oC, 100 kPa and the product exiting at

Question:

Ethylene burns with 50% excess air, both entering at 25oC, 100 kPa and the product exiting at the same temperature and pressure. Determine
(a) The lower heating value,
(b) The higher heating value and
(c) The heat transfer per kmol of fuel without assuming complete vapor or complete liquid in the product.