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October 25, 2014

Homework Help: Chemistry - enthalpy reivison(help)

Posted by Farah on Tuesday, March 29, 2011 at 8:09pm.

58. When a vehicle is parked in the sunlight on a hot summer day, the temperature inside can approach 55C. One company has patented a non-CFC propelled aerosol that can be sprayed inside a vehicle to reduce the temperature to 25C within seconds. The spray contains a mixture of two liquids: 10% ethanol, C2H5OH, and 90% water by mass.
equation: C2H5OH + H2O = 2CO2 + 6H2
1.0 g of the aerosol is sprayed into a hot vehicle. How much heat (in kJ) can be absorbed due to vaporization of the aerosol? Note: ΔHvap of water = 44.0 kJ/mol and ΔHvap of ethanol = 38.56 kJ/mol

i used the deltaH = n(deltaHx)

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