Methanol (CH3OH) burns in oxygen to form carbon dioxide
and water...

Question

Methanol (CH3OH) burns in oxygen to form carbon dioxide
and water. Write a balanced equation for the combustion of liquid methanol and calculate ΔH°
rxn, ΔSrxn ° , and ΔGrxn ° at 25 °C. Is
the combustion of methanol spontaneous?

Accepted Answer

Hi everyone. And this question we're asked to write a balanced equation for the combustion reaction of liquid one beauty and all in oxygen that produces carbon dioxide and water and at 25 degrees Celsius were asked what is the delta S. Of the reaction? Delta H. Of the reaction in delta G. Of the reaction. And does its combustion occur spontaneously? For one beauty? No, This is c. four H. 90. H. So for the reaction we have this liquid Rapping with 0. 2 gas, It's gonna produce c. 0. 2 gas Plus H 20. Like when if you were to balance this, We have four carbons on wrapping side, 10 hydrogen oxygen on the product side, we have one carbon, two hydrogen and three oxygen. Since we have 10 hydrogen on the wrapping side, but only two on the product side, you can multiply by five over here put a five in front of H 20. Liquid And it's multiplied by four over here. Put a four in front of c. 0. 2. We bounced the carbon out as well And I have 13 oxygen on the product side. They can put a six in front of 02 To get 13 auction over here as well. Now this is balanced Balanced reaction gonna be c. four H. 90. H. Quinn 602 gas getting four C. 02. Yes Plus five H. 20. Like when recall that delta G. Of the reaction, it was delta H. Of the reaction minus T. Tell himself to s other reaction, we need to first find delta S. Of the reaction. And this is the sum of the number of most times delta S. M. Other products. This is some tell us the number of moles come still to S. M. Other reactant Delta S. m. of c. four H. N. O. H. We get 225.8 bills promote thomas kelvin. For delta S. And of 02 Get 20. 5.2. That's from all times kelvin for delta S. M. The option Get 213.8 years promote from kelvin. And for delta S. M. Of H. 20. We get 1 88.8 joules per mole kelvin. For Delta. S other reaction we're four malls a seat up here Times 2 13. joe's prime. All kelvin plus five malls of H. +20 House 1 88.8. How's kelvin minus one more before H. N. O. H. That was 2 25.8. I was kelvin plus six more 02 205 point to those from all times kelvin. The delta s of the reaction. You can stand to 42 €0.2 per Calvin. It's also 0.34. You to those kilograms per kevin, your daughter H Other reaction we get the sound was a number of malls H. F. Other product minus the number minus the sum of the number of moles times delta H. F. Other reactant Delta H. f. c. four H. N. O. H. Make 3 27.3 will just promote Doctor H. F. B. 02 - .5. They'll just come all delta H. F. 020 per mole. Doctor H. F. Of H. 20. Mega to 41.8 soldiers promote for delta H. Other reaction for most up here was negative 2 93 0.5. So joe's arm all plus five malls H. Two L. Times -241 0.8. They'll just promote minus one more 34 H. 90. H. I was gonna get through 27.3 joe's promote six miles. Jim. I'm zero killer goals are more the delta H. Other reaction Isn't that field goals. And for delta G. Of the reaction 2456. Hello jules -25°C plus 2 73. Time 0.3 to kill a jobs promote just for kevin. Delta G. Other reaction -2558. Yo jules. I said spell to G. Other reaction. It's negative. It's gonna be spontaneous. Thanks for watching my video and I hope it was helpful

Methanol (CH3OH) burns in oxygen to form carbon dioxide and water. Write a balanced equation for the combustion of liquid methanol and calculate ΔH° rxn, ΔSrxn ° , and ΔGrxn ° at 25 °C. Is the combustion of methanol spontaneous?

Watch next