# (PExercises: Molecules and Comp X PExercises: ThermochemistryFilesX(218) Enthan.com/eplayer/book/2E5IYU4ZQG2/page/adf65754b38ca13018768451b8d38a08c17019f2b?platforms.id-mastering&b=2E5Exercises: ThermochemistryIf a bottle of nail polish remover contains 177 mL of acetone, how much heat is releasby its complete combustion? The density of acetone is 0.788 g/mL.MISSED THIS? Read Section 7.6; Watch IWE 7.7D60.What mass of natural gas (CH) must burn to emit 267 kJ of heatCH4(g) +2 O2(g)CO2(g) + 2 H2O(g)AH 802.3 kJNitromethane (CH3NO2) burns in air to produce significant amounts of heat.61.2 CH3NO2 (1) 3/2 O2 (g)2 CO2 (g) +3 H20(1) + N2(g)AH-1418 kJIXnHow much heat is produced by the complete reaction of 5.56 kg of nitromethane?MISSED THIS? Read Section 7.6Watch IWE 7.762.Titanium reacts with iodine to form titanium(III) iodide, emitting heat.839 kJ2 Ti(s) +3 I2 (g)2 Til3 (s) AHflcIXnIs it TiDon'trDetermine the masses of titanium and iodine that react if 1.55 x 10 kJ of heatby the reaction.InvestThe propane fuel (C3H3) used in gas barbeques burns according to the thermo63.CLICKequation:

Question
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Looking at #61. I got the correct answer of 6.46x10^4, but I don't understand why the solution is positive instead of negative.

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Step 1

The amount of nitromethane is 5560 grams

The molecular weight of nitromethane is 61.04 g/mol

Let the moles of nitromethane in the feed is ‘x’

Step 2

2 moles of nitromethane produces 1480 kJ of energy.

The he...

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