Molecules in Subscript

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Jason Muljadi 2C
Posts: 62
Joined: Thu Jul 27, 2017 2:01 am

Molecules in Subscript

Postby Jason Muljadi 2C » Sat Nov 25, 2017 11:16 pm

Do you only have your molecules in subscript (i.e. PH2O) when you have just K? I noticed that, when the question asks for Kc, you don't need to write out P(molecule) to find your equilibrium constant.

Justin Chu 1G
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Joined: Thu Jul 13, 2017 2:00 am
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Re: Molecules in Subscript

Postby Justin Chu 1G » Sun Nov 26, 2017 12:18 am

This is because for Kc, you already state which molecule you are referring to in brackets (i.e. [H20]) when referring to its concentration.

Angelica Mercado 1A
Posts: 21
Joined: Fri Sep 29, 2017 6:04 am

Re: Molecules in Subscript

Postby Angelica Mercado 1A » Sun Nov 26, 2017 5:56 pm

K is unitless because the the units of equilibrium partial pressure of a certain gas (Pmolecule ) are canceled by the units of standard pressure, hence you would need to write the molecules as a subscript of P. Pmolecule is then understood to be the numerical value of the pressure in bar (bar being standard pressure).

Jessica Benitez 1K
Posts: 50
Joined: Fri Sep 29, 2017 6:04 am

Re: Molecules in Subscript

Postby Jessica Benitez 1K » Sun Nov 26, 2017 7:08 pm

We write P subscript molecule when we are looking for Kp. The P subscript molecule notation means the partial pressure of the molecule.

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