Calculate the enthalpy of combustion of 1 mol of ethanol using mean bond enthalpy (kJ/mol) data: C-C (347), C-H (413), C-O (358), O-H (464), O=O (498), C=O (805)

First we need to construct the equation of the combustion: C2H5OH(l) + 3O2(g) --> 2CO2(g) + 3H2O(l)Use aid of structural formulaLeft hand side (endothermic - requires energy):5(413) + 347 + 358 + 464 + 3(498) = 4728 kJ Right hand side (exothermic - releases energy):-[6(464) + 4(805)] = -6004 kJEnthalpy of combustion = 4728 - 6004 = -1276 kJ/mol

LL
Answered by Lewis L. Chemistry tutor

10106 Views

See similar Chemistry KS3 tutors

Related Chemistry KS3 answers

All answers ▸

Bluebells can reproduce sexually by producing seeds or asexually by producing bulbs. Name two advantages of sexual reproduction and two advantages of asexual reproduction.


Walk me through the separation of an insoluble solid from a liquid


Explain the trend in reactivity along period 3 of the periodic table?


Octane and isooctane can be separated in a laboratory. Name this technique and outline how they are separated.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences