Asked Oct 1, 2019

10. From the following heats of combustion,

CH3OH(l) + 3/2O2(g) → CO2(g) + 2H2O(l) ΔHorxn = –726.4 kJ/mol
C(graphite) + O2(g) → CO2(g) ΔHorxn = –393.5 kJ/mol
H2(g) + ½O2(g) → H2O(l) ΔHorxn = –285.8 kJ/mol

Calculate the enthalpy of formation of methanol (CH3OH) from its elements.
C(graphite) + 2H2(g) + ½O2(g) → CH3OH(l)


Expert Answer

Step 1

Image Transcriptionclose

Tren eaction ic shonm belon: U) CHOH )20,(q) The PH+3)coig) + 2 0l) A clpraphite) 새우지 -726-4 kTmd AH 393.5 KImol 285 G KJ m AH

Step 2

Image Transcriptionclose

The eaetio u) is reversed as shonm belon co(q24o1)- 02 an 264 kJMol

Step 3

Image Transcriptionclose

The readtion3) ic multiplied by 2 and i AHo, is to the same number as shonn below: wultiplied by 2,0) A2(-285.8) = -571.6 kTMol (5)


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Physical Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: Calculate the mass (in g). 5.0x10^25 O3 molecules

A: Given,Molecules of O3 = 5.0 × 1025Moles of O3 can be calculated as:


Q: Calculate the percent composition of sand in the mixture using the mass of the recovered sand Calcul...

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,...


Q: Give the balanced equation that describes the combustion of butane

A:  Combustion is burning of any substance in presence of oxygen.The chemical formula of butane is C4H1...


Q: Question 6

A: The reaction in which the ions of the two reactants get exchanged to form products is known as doubl...


Q: solutions of zinc nitrate and potassium hydroxide are combined. (a) give the balanced molecular equa...

A: In a chemical reaction; the substance which involves in conversion is said to be reactant whereas th...


Q: Calculate the molarity of 25.3 g of MgS in 967 mL of solution

A: Given,Mass of MgS = 25.3gVolume of solution = 967mL


Q: 6Li + N2 -> 2Li3N Whar is the theoretical yield of Li3N in grams when 12.3g of Li are heated with...

A: Given,Mass of lithium = 12.3g Mass of nitrogen = 33.6g


Q: Decide whether each compound is ionic or covalent?  MgCl2 CO2 Li2S V2O5 NaCl CH4 NF3

A: Ionic bond – Ionic bond is formed between the two atoms, in which one of the atom loses electrons co...


Q: |Decaborane, BH14, was used as a fuel for rockets in the 1950s. It reacts violently with oxygen, O t...

A: The balanced chemical reaction between decaborane (B10H14) and oxygen (O2) can be written as follows...