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Postby saigorijavolu2k » Sun Feb 09, 2020 10:17 pm

When does deltaH = q. I remember hearing that q always deltaH, but the reverse is not true? I am unsure if I heard correctly and why this is so/

Ashley Wang 4G
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Re: q=H

Postby Ashley Wang 4G » Sun Feb 09, 2020 10:44 pm

q = ∆H(rxn) if the reaction occurs under conditions of constant pressure, just by the definition of enthalpy change (the heat absorbed/released in a reaction at constant pressure).

Nathan Rothschild_2D
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Re: q=H

Postby Nathan Rothschild_2D » Sun Feb 09, 2020 10:54 pm

I believe you have it switched. deltaH is always q, while q is = to deltaH at constant pressure

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Re: q=H

Postby 005162520 » Sun Feb 09, 2020 11:56 pm

I know that q is not always delta H, but it can if it is at constant pressure. But why is delta H always q?

Alan Cornejo 1a
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Re: q=H

Postby Alan Cornejo 1a » Sun Mar 15, 2020 7:19 am

Delta H is equal to q when no work is done onto a system, such as a constant pressure

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