Question

If a bottle of nail polish remover contains 153 g of acetone, how much heat would...

If a bottle of nail polish remover contains 153 g of acetone, how much heat would be released by its complete combustion? Consider the following equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover.
C3H6O(l)+4O2(g)→3CO2(g)+3H2O(g)
ΔHrxn=−1790kJ

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Answer #1

acetone has molar mass = 58.08 g/mole...

179 mL x (0.788 g / mL) x (1 mole / 58.08 g) = 2.43 moles acetone

from the balanced equation...1 mole of acetone releases +1790 kJ of heat upon combustion.

2.43 moles x 1790 kJ/mole = 4350 kJ


that value is +... not negative. the negative sign is for the reaction and indicates that 1790 kJ are "released" by the combustion of 1 mole of acetone. if you say -4350 kJ are released, that means 4350 kJ are absorbed. That wasn't the case...

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