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### Negative q

Posted: Wed Feb 06, 2019 11:23 pm
When do you use a negative value for q when calculating entropy?

### Re: Negative q

Posted: Wed Feb 06, 2019 11:31 pm
Heat (q) is negative when the amount of heat is being released/reaction is exothermic. The equation for entropy includes delta q, or the change in q; this is how q and entropy are related.

### Re: Negative q

Posted: Thu Feb 07, 2019 12:21 am
A negative q value stands for negative heat. This corresponds to vaporization and melting.

### Re: Negative q

Posted: Thu Feb 07, 2019 11:13 am
A negative q signifies that heat is being lost/released from the system into the surroundings.

### Re: Negative q

Posted: Thu Feb 07, 2019 11:31 am
A negative q signifies that the reaction is exothermic and that heat is being released with the reaction.

### Re: Negative q

Posted: Sun Feb 10, 2019 10:42 am
it means its exothermic and heat is being released from the reaction

### Re: Negative q

Posted: Sun Feb 10, 2019 4:50 pm
It is when energy is released from a system to an environment, meaning the reaction is going to be exothermic. Depending on the problem, it may make you calculate q, and that just means energy is released.

### Re: Negative q

Posted: Sun Feb 10, 2019 4:51 pm
When there is a negative q, heat id negative which means itâ€™s being released.