The combustion of 0.4196 g of a hydrocarbonreleases 17.55 kJ of heat. The masses of theproducts are ??2 = 1.419 g and ?2? = 0.290 g.a. If the approximate molar mass of thecompound is 76 g, calculate its standardenthalpy of formation.

The combustion of 0.4196 g of a hydrocarbonreleases 17.55 kJ of heat. The masses of theproducts are ??2 = 1.419 g and ?2? = 0.290 g.a. If the approximate molar mass of thecompound is 76 g, calculate its standardenthalpy of formation.

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 52E: Before the introduction of chlorofluorocarbons, sulfur dioxide (enthalpy of vaporization, 6.00...

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Question

The combustion of 0.4196 g of a hydrocarbon
releases 17.55 kJ of heat. The masses of the
products are ??2 = 1.419 g and ?2? = 0.290 g.
a. If the approximate molar mass of the
compound is 76 g, calculate its standard
enthalpy of formation.

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