Hi, I'm really stuck on these questions and have no idea what to do so would be really grateful for any help about the answer and how to do it.
a. A spirit burner containing ethanol was weighed at 58.37g. It was then lit, and used to heat a can containing 200cm3 of water for three minutes, after which it was extinguished and was found to weigh 57.52g. The temperature of the water increased from 21.5C to 52.0C.
Calculate the enthalpy of combustion of ethanol.
b. Given your answer to part a, and that the data book value for the standard enthalpy of combustion of ethene is -1409kJmol-1, set up an appropriate Hess cycle and use it to calculate the enthalpy change for the reaction below.
C2H4(g) + H2O(l) ------> C2H5OH(l)