## Negative k value

AhYeon_Kwon_2H
Posts: 48
Joined: Fri Sep 28, 2018 12:27 am

### Negative k value

For 7B.9 part a in the 7th edition, I got that k is -0.17, but the answer key gives it without the negative. Does k always have to be positive, and if so, do I just drop the negative sign and keep the numerical value the same?

AhYeon_Kwon_2H
Posts: 48
Joined: Fri Sep 28, 2018 12:27 am

### Re: Negative k value

Oops, I put in the wrong numbers for that problem. But regardless, can there be a negative k value?

He whose name cannot be spoken
Posts: 20
Joined: Sat Apr 28, 2018 3:00 am

### Re: Negative k value

AhYeon_Kwon_2H wrote:Oops, I put in the wrong numbers for that problem. But regardless, can there be a negative k value?

Sure. It just depends on the perspective of k.

If you have a reaction $A\rightarrow B+C$ and the k you're given is "rate of production of A", it's gonna be negative, because you're losing A.