Question

For the complete combustion of 1.000 mole of ethane gas at 298K and 1 atm pressure, change in H= -1560 kJ/mol. What will be the heat released when 4.42g of ethane is combusted under these conditions?

Answer 1

2C2H6 + 7O2 ==> 4CO2 + 6H2O

How many mols ethane do you have? That's 4.42g/molar mass ethane = approx 0.15 but you need a more accurate answer.
Then you know you get 1560 kJ for 1 mol so you will get ? for 0.15 mol?

Answer 2

8945