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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: sparkly on March 25, 2009, 11:11:22 PM

Title: Hess's law
Post by: sparkly on March 25, 2009, 11:11:22 PM

Hess's law ____.
Choose one answer.
   a. determines the way a calorimeter works    
   b. makes it possible to calculate ΔH for complicated chemical reactions    
   c. states that when you reverse a chemical equation, you must change the sign of ΔH    
   d. describes the vaporization of solids    

I keep leaning toward B, but then i think it could be A too. B just seems too simple of an answer. What do you think?

Title: Re: Hess's law
Post by: Borek on March 26, 2009, 03:43:16 AM

I would go with B too.

Title: Re: Hess's law
Post by: super_kaka1402 on March 26, 2009, 05:25:17 AM

A and B are both true, but B is not the best answer so my choice is A !
 ;)

Title: Re: Hess's law
Post by: Borek on March 26, 2009, 06:18:41 AM

Calorimeter works thanks to the energy conservation, it doesn't need Hess law.

Title: Re: Hess's law
Post by: Iwillbethebest on March 27, 2009, 09:06:45 PM

id say B or C
but im more inclined on B

Title: Re: Hess's law
Post by: Xenophilius on March 28, 2009, 06:52:33 AM

I think B would be much more appropriate