Calculate the standard enthalpy of combustion of a methane sample by using the standard enthalpies of formation.

Write the equation and balance it. CH4 + 2O2 --> CO2 + 2H2O Assign the enthalpies of formation and the sign of the energy value with the corresponding molecule (Will demonstrate my technique if needed). e.g. C(s) + 2H2(g) --> CH4(g) Delta H(f) = -74.87

Generate an equation will all assigned values and the single unknown Delta H(combustion/c). Rearrange for Delta H(c). Answer is - 890.63 KJ/mol.

Answered by Axel C. Chemistry tutor

22065 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Why does an ionic compound (e.g. NaCl) conduct electricity when molten or dissolved in water, but not when it is a solid.


In what conditions does sodium chloride conduct electricity and why?


A solution of ethanoic acid in water has a concentration of 3 g/dm^3. Given that the pKa of ethanoic acid is 4.76, calculate the pH of this solution.


What is a disproportionation reaction?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences