**Exercise Set 1-26

2017-03-14View Original

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This post was last edited by 2005180005 on 2017-3-14 at 10:28. Water and methanol are in liquid state at 1 atm and 25°C; then why is the reaction heat for ethanol synthesis always calculated based on their gaseous state?

Reply #22017-03-14

Of course, if there’s an equation, then we follow that equation

Reply #32017-03-20

The definition of reaction heat seems to be that the products are in the gas phase; in cases where water is produced, water is expressed as being in the gas phase, and then the standard molar reaction heat is given. If water vaporizes, does ethanol also vaporize?

Reply #42017-03-27

C represents the enthalpy of combustion, and f represents the enthalpy of formation

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**Exercise Set 1-26

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