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### units

Posted: Wed Feb 20, 2019 6:49 pm
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
K is a ratio, so it has no units.

### Re: units

Posted: Wed Feb 20, 2019 8:23 pm
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
K is unitless

### Re: units

Posted: Wed Feb 20, 2019 10:28 pm
Remember that K is a constant, and therefore has no units(:

### Re: units

Posted: Wed Feb 20, 2019 10:49 pm
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
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
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
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
K is unit less because all units should cancel each other out

### Re: units

Posted: Tue Mar 12, 2019 1:00 pm
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
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
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
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
K is unitless

### Re: units

Posted: Sat Mar 16, 2019 8:05 pm
it's because there shouldn't be any units for K