Negative q


Moderators: Chem_Mod, Chem_Admin

Melissa Villanueva1K
Posts: 64
Joined: Wed Nov 15, 2017 3:01 am

Negative q

Postby Melissa Villanueva1K » Wed Feb 06, 2019 11:23 pm

When do you use a negative value for q when calculating entropy?

Catly Do 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:24 am

Re: Negative q

Postby Catly Do 2E » 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.

inlovewithchemistry
Posts: 104
Joined: Fri Sep 28, 2018 12:19 am

Re: Negative q

Postby inlovewithchemistry » Thu Feb 07, 2019 12:21 am

A negative q value stands for negative heat. This corresponds to vaporization and melting.

Courtney Quan 1C
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 2 times

Re: Negative q

Postby Courtney Quan 1C » Thu Feb 07, 2019 11:13 am

A negative q signifies that heat is being lost/released from the system into the surroundings.

Calvin Patel 2H
Posts: 37
Joined: Fri Sep 28, 2018 12:22 am

Re: Negative q

Postby Calvin Patel 2H » 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.

Hilda Sauceda 3C
Posts: 76
Joined: Fri Sep 28, 2018 12:24 am

Re: Negative q

Postby Hilda Sauceda 3C » Sun Feb 10, 2019 10:42 am

it means its exothermic and heat is being released from the reaction

Rami_Z_AbuQubo_2K
Posts: 89
Joined: Thu Jun 07, 2018 3:00 am

Re: Negative q

Postby Rami_Z_AbuQubo_2K » 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.

Aiden Atoori 1C
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: Negative q

Postby Aiden Atoori 1C » Sun Feb 10, 2019 4:51 pm

When there is a negative q, heat id negative which means it’s being released.


Return to “Concepts & Calculations Using Second Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 1 guest