Wednesday
October 22, 2014

Homework Help: chem

Posted by tomi on Friday, October 3, 2008 at 11:58pm.

The combustion of hydrogen–oxygen mixtures is used to produce very high temperatures (approximately 2500 °C) needed for certain types of welding operations. Consider the reaction to be
H2(g) + 1/2O2(g) --> H20(l)

Standard enthalpy is -241.8kj


What is the quantity of heat evolved,
in kilojoules, when a 140g mixture containing equal parts of H2 and O2 by mass is burned?

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