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Posted by on Tuesday, October 25, 2011 at 9:21pm.

use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures
Delta Hrxn = ? kJ

  • chemistry - , Tuesday, October 25, 2011 at 9:24pm

    DHfrxn = (n*DHf products)-(n*DHf reactants)
    Look up DHf values in your text or notes.

  • chemistry - , Tuesday, October 25, 2011 at 9:38pm

    we dnt take notes that's why im so lost

  • chemistry - , Tuesday, October 25, 2011 at 9:59pm

    Then look in your text. Most texts have a set of delta Hof values.

  • chemistry - , Tuesday, October 25, 2011 at 10:00pm

    And I might suggest you take notes. You can't possibly remember everything.

  • chemistry - , Tuesday, October 25, 2011 at 10:18pm

    honestly all we do is labs during class i would love to take notes

  • chemistry - , Tuesday, October 25, 2011 at 10:53pm

    Do you have a table in your text? I may be able to find a table on the web or I can look up some values if your text doesn't have them listed.

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