What exactly is heat of combustion? How would I calculate it?

AI Thread Summary
Heat of combustion refers to the energy released when a substance is burned in oxygen, typically measured per mole. To calculate the heat of combustion for butane using the provided data, one must first determine the heat absorbed by the water (q) using its mass and temperature change. The equation for the combustion of butane is given, but the calculation must be adjusted to reflect the amount of butane burned, converting grams to moles. The confusion arises from the distinction between calculating q and determining the heat of combustion per mole. Understanding these concepts is crucial for accurately performing the calculation.
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1. Calculate heat of combustion for butane. Given:

mass water- 129.91g
mass butane 0.15g
old temp- 16.4 degrees C
new temp.- 26.7 degrees C

2. Homework Equations

2C4H10 + 3O2 yields 8CO2 + 10H2O

3. The Attempt at a Solution

I've tried, but I really have no idea. I only know how to calculate q and apparently that's not the same.
 
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Heat of combustion is per mole, what you have calculated is for 0.15g...
 
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