Calculate the heat of combustion in kJ/mol of methanol (CH3OH). CH3OH + O2 => CO2 + H2O (not balanced) Bond energies (kJ/mol): C-H 413 C-O 358 C=O 745 O2 498 O-H 467 A. -547 kJ/mol B. -655 kJ/mol C. -1094 kJ/mol D. +1094 kJ/mol E. +547 kJ/mol
Added by Silvia P.
Close
Step 1
The heat of combustion in kJ/mol of methanol is C-1094 kJ/mol. Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 60 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The combustion of methanol is shown by the following equation: 2CH3OH(l) + 3O2(g) -> 2CO2(g) + 4H2O(g) i. Given the heat of formation data which follows: a. Find the heat of reaction for the equation above. (1 mark) b. State the molar heat of combustion of methanol. (1 mark) ii. What mass of water could be heated from 20.0°C to 35.0°C by the burning of 2.57 mol of methanol? C_H2O = 4.184 kJ/kg°C (4 marks) C(s) + O2(g) -> CO2(g) + 393 kJ H2(g) + 1/2O2(g) -> H2O(g) + 242 kJ C(s) + 2H2(g) + 1/2O2(g) -> CH3OH(l) + 638 kJ
Sri K.
Question The combustion of methanol is shown by the final equation: 2 CH3OH(l) + 3 O2(g) = 2 CO2(g) + 4 H2O(g) Given the data which follows: a. Find the heat of reaction for the equation above. b. State the molar heat of combustion of methanol. c. State whether the reaction is endothermic or exothermic C + O2 = CO2 + 393 kJ H2 + 1/2 O2 = H2O + 242 kJ C + 2H2 + 1/2 O2 = CH3OH + 638kJ
Susan H.
The equation for the combustion of gaseous methanol is 2 CH3OH(g) + 3 O2(g) -> 2 CO2(g) + 4 H2O(g). Using average bond energies given, estimate the enthalpy change (in kJ mol^-1) of this reaction? Bond | Bond Energy (kJ mol^-1) C-H | 413 C-O | 358 O-H | 463 C=O | 745 O=O | 498 Methanol | Oxygen | Carbon dioxide H | O=O | O=C=O H-C-OH | H
David C.
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD