Delta H

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Marsenne Cabral 1A
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Delta H

Postby Marsenne Cabral 1A » Mon Jan 28, 2019 3:51 pm

What is the difference between Delta H and T? Today in Lecture Lavelle said that an increase in T would mean the reaction is exothermic, and that would mean that the delta H is negative, so how would that work?

Cody Do 2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Delta H

Postby Cody Do 2F » Mon Jan 28, 2019 4:01 pm

Delta T is the change in temperature (Final Temperature - Initial Temperature) while Delta H is the change in Enthalpy.

Adam Vuilleumier 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Re: Delta H

Postby Adam Vuilleumier 2K » Mon Jan 28, 2019 4:03 pm

Temperature and heat are different things in chemistry. Temperature is measured in Kelvin or degrees Celsius, but heat is an energetic concept measured in joules.

Ashe Chen 2C
Posts: 31
Joined: Mon Jan 07, 2019 8:23 am

Re: Delta H

Postby Ashe Chen 2C » Mon Jan 28, 2019 4:12 pm

Delta T indicates a change in temperature where delta H indicates a change in energy, or enthalpy

Ray Guo 4C
Posts: 90
Joined: Fri Sep 28, 2018 12:15 am

Re: Delta H

Postby Ray Guo 4C » Mon Jan 28, 2019 4:59 pm

An increase in T means that the surroundings have taken up some energy given out by the reaction. If a reaction system gives off energy then its own energy content has decreased, hence a decrease in enthalpy (H).

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