The complete combustion of ethanol, C2H5OH (FW = 46.0 g/mol), proceeds as follows:

Question

C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) ΔH = −555 kJ
What is the enthalpy change for combustion of 15.0 g of ethanol

Answer 1

-555 kJ x (15.0/46.0) = ?

Answer 2

-181.0

Answer 3

181

Answer 4

-181 kJ