Problem: Ethanol, C2H6O, reacts in the body via the following equation:C2H6O(aq) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) + 327 kcalHow much heat, in kilocalories, is produced when 6.80 g of ethanol reacts with O2 gas?Express the heat to three significant figures and include the appropriate units.(According to the chemical equation, each mole of ethanol that reacts will produce 327 kcal. Therefore, you should first convert the mass of ethanol to its number of moles. Then, calculate the heat released when that number of moles reacts. Make certain your conversion factors are set up to allow undesired units to cancel.)

FREE Expert Solution

We’re being asked to determine the heat, in kilocalories, is produced when 6.80 g of ethanol reacts with O2 gas. 


The given reaction is:

C2H6O(aq) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) + 327 kcal


From the balanced equation, we can see that the given 327 kcal of heat corresponds to 1 mole of C2H6O (ethanol)


Recall that at constant pressure, heat is equivalent to enthalpy.


q (heat) = ΔH (enthalpy)


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Problem Details

Ethanol, C2H6O, reacts in the body via the following equation:

C2H6O(aq) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) + 327 kcal

How much heat, in kilocalories, is produced when 6.80 g of ethanol reacts with O2 gas?

Express the heat to three significant figures and include the appropriate units.

(According to the chemical equation, each mole of ethanol that reacts will produce 327 kcal. Therefore, you should first convert the mass of ethanol to its number of moles. Then, calculate the heat released when that number of moles reacts. Make certain your conversion factors are set up to allow undesired units to cancel.)

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