## States of Matter In Chemical Equations

Christine Pahel 1C
Posts: 10
Joined: Fri Sep 25, 2015 3:00 am

### States of Matter In Chemical Equations

In a chemical reaction where the byproduct is CO2, is the CO2 always in a gaseous state?

Annie Qing 2F
Posts: 28
Joined: Fri Sep 25, 2015 3:00 am

### Re: States of Matter In Chemical Equations

I believe since the boiling point for $CO_{2}$ is -78.5°C and reactions generally occur above that temperature, $CO_{2}$ is usually found as a gas.
If by some chance the reaction occurred under -78.5˚C, I think $CO_{2}$ would be found as a solid (because $CO_{2}$ sublimates) under normal pressure circumstances. Under rare circumstances, it may be found as a liquid.

Christopher Lew 1L
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

### Re: States of Matter In Chemical Equations

Annie is correct. For most chemical reactions, correct me if i'm wrong, but we assume that they are taking place under room temperature unless stated otherwise. The question will have to specifically tell you that the reaction is being performed under a specific condition. So, we just assume that the reaction is happening under room temperature and 1 atm. As for this class, I don't think you have to put the states of matter unless told to do so.