Problem: The complete combustion of ethanol, C2H5OH(l), to form H2O(g) and CO2(g) at constant pressure releases 1235 kJ of heat per mole of C2H5OH. Draw the correct enthalpy diagram for the reaction.

🤓 Based on our data, we think this question is relevant for Professor Bindell's class at UCF.

FREE Expert Solution

Recall that an energy or enthalpy diagram is usually read from left to right

  • Energy change (ΔH or ΔG˚): is the difference in energy between products and reactants


When energy is released → process is exothermic → ΔH < 0 or negative:

  • ΔHproducts < ΔHreactants


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Problem Details

The complete combustion of ethanol, C2H5OH(l), to form H2O(g) and CO2(g) at constant pressure releases 1235 kJ of heat per mole of C2H5OH. Draw the correct enthalpy diagram for the reaction.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Internal Energy concept. You can view video lessons to learn Internal Energy. Or if you need more Internal Energy practice, you can also practice Internal Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Bindell's class at UCF.