Assume that you can heat water with perfect insulation (all the heat from combus
ID: 1081644 • Letter: A
Question
Assume that you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred water). Show your work in your lab notebook. How much energy (in Joules) are needed to heat 200 grams of water by 10°C? Number 8368J How many millimoles of ethanol would you need to burn to generate the amount of energy you calculated in t first part of this question (above)? Number 7400 mmol ethanol What is the volume of ethanol required to heat 200 mL water by 10°C? Number .36 mL Incorrect.Explanation / Answer
heat of combustion of ethanol = 1368 kJ/mol
1 mol ethanol ---------------> 1368 kJ
?? -----------------> 8.368 kJ
moles of ethanol = 8.368 x 1 / 1368
= 6.117 x 10^-3 mol
mmoles of ethanol = 6.12 mmol ethanol