Page 1 of 1
units
Posted: Wed Feb 20, 2019 6:49 pm
by Madelyn Cearlock
I got marked down for putting "bar" in my K value on the midterm. Does anyone know why this is?
Re: units
Posted: Wed Feb 20, 2019 7:16 pm
by Ashley Kim
K is a ratio, so it has no units.
Re: units
Posted: Wed Feb 20, 2019 8:23 pm
by Nicolette_Canlian_2L
You would only use bar if the question were to ask, for example, the pressure of the gas at equilibrium.
Re: units
Posted: Wed Feb 20, 2019 10:06 pm
by Selina Bellin 2B
K is unitless
Re: units
Posted: Wed Feb 20, 2019 10:28 pm
by Jeannine 1I
Remember that K is a constant, and therefore has no units(:
Re: units
Posted: Wed Feb 20, 2019 10:49 pm
by Vy Lu 2B
K should not have any units since it is a ratio of concentrations/partial pressures.
Re: units
Posted: Wed Feb 20, 2019 10:51 pm
by Casandra
K doesn't have any units, due to it being a ratio (in which the units cancel)
Re: units
Posted: Thu Feb 21, 2019 12:02 am
by Desiree1G
Yes remember K does not have a unit because it is a ration and I believe those units cancel out.
Re: units
Posted: Thu Feb 21, 2019 1:32 am
by LeannaPhan14BDis1D
I did it too and the people above say it's bc k doesn't have units
Re: units
Posted: Thu Feb 21, 2019 1:52 am
by Celio_G_Dis2C
K is unit less because all units should cancel each other out
Re: units
Posted: Tue Mar 12, 2019 1:00 pm
by Pritish Patil 1K
K does not have units, which is why points were probably taken off for writing bar after k. The units should cancel each other out as well.
Re: units
Posted: Tue Mar 12, 2019 3:19 pm
by Lauren Huang 1H
Although the products and reactants involved in Kp and Kc use units such as molarity and bar, the units cancel out in the end so K is unitless.
Re: units
Posted: Tue Mar 12, 2019 3:54 pm
by Aleeque Marselian 1A
The equilibrium value, K, is a ration of products to reactants, so mathematically the units should cancel out and the calculation would not have units.
Re: units
Posted: Tue Mar 12, 2019 4:39 pm
by RachelCheung1A
The units in K should cancel out so there shouldn't be any units for K.
Re: units
Posted: Sat Mar 16, 2019 12:45 pm
by jocelyntzeng
K is unitless
Re: units
Posted: Sat Mar 16, 2019 8:05 pm
by Jacqueline Duong 1H
it's because there shouldn't be any units for K