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Hess's cycle

For hess's cycle in the question if it says to calculate enthalpy of combustion but gives us formation values do we construct a combustion cycle? e.g.


As in another question it says to calculate formation and we're given combustion values but we have to construct a combustion cycle. e.g.


thanks!
Original post by Secret.
For hess's cycle in the question if it says to calculate enthalpy of combustion but gives us formation values do we construct a combustion cycle? e.g.


As in another question it says to calculate formation and we're given combustion values but we have to construct a combustion cycle. e.g.


thanks!


Maybe if you read through this interactive on Hess law you will see how to tackle these questions.

Here's a video explanation of the same interactive.

[video="youtube;c66cfA7eq_g"]http://www.youtube.com/watch?v=c66cfA7eq_g&feature=share&list=PLD9B9DE6921E96191[/video]
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Secret.
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Original post by charco
Maybe if you read through this interactive on Hess law you will see how to tackle these questions.

Here's a video explanation of the same interactive.

[video="youtube;c66cfA7eq_g"]http://www.youtube.com/watch?v=c66cfA7eq_g&feature=share&list=PLD9B9DE6921E96191[/video]


Hi! Thanks very much I'll definitely book mark that to refer back to it :biggrin:

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