Constant P vs Constant V  [ENDORSED]

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Constant P vs Constant V

Postby MorganYun1H » Tue Jan 09, 2018 8:38 pm

I know that when P is constant, q=deltaH for the reaction. What happens when V is constant? Is there a certain relationship between these two?

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Re: Constant P vs Constant V

Postby Humza_Khan_2J » Tue Jan 09, 2018 9:12 pm

From what I understand, q=cdeltaT regardless of constant V or P; however, the C constants would differ in these two distinguishable scenarios.

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Re: Constant P vs Constant V  [ENDORSED]

Postby Chem_Mod » Tue Jan 09, 2018 11:19 pm

I discussed this earlier today online. See previous posts.

When volume is constant then and w = 0.

Therefore = qv

I will discuss all of this in detail in class next week when we start thermodynamics.

This week we are covering the 2nd half of Chapter 8 which is thermochemistry.

Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

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