Problem: Methanol (CH3OH) has also been proposed as an alternative fuel. Calculate the standard enthalpy of combustion per gram of liquid methanol, and compare this answer to that for ethanol in Exercise 87.

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We are being asked to calculate the standard enthalpy of combustion per gram of liquid methanol, and compare this answer to that of ethanol


Recall that ΔH˚rxn can be calculated from the enthalpy of formation (ΔH˚f) of the reactants and products involved: 

H°rxn = H°f, products - H°f, reactants



We are going to do the following steps to solve the problem:

Step 1: Calculate the standard enthalpy of combustion per gram of liquid methanol

Step 2: Calculate the standard enthalpy of combustion per gram of liquid ethanol

Step 3: Compare the standard enthalpy between methanol and ethanol


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Problem Details

Methanol (CH3OH) has also been proposed as an alternative fuel. Calculate the standard enthalpy of combustion per gram of liquid methanol, and compare this answer to that for ethanol in Exercise 87.

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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 Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.

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Based on our data, we think this problem is relevant for Professor Long's class at Trinity University.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.