delta H vs q

Dhwani Krishnan 1G
Posts: 63
Joined: Fri Sep 28, 2018 12:17 am

delta H vs q

What is the difference between and q? How are they related?

katherinemurk 2B
Posts: 68
Joined: Wed Nov 15, 2017 3:02 am

Re: delta H vs q

delta H is change in enthalpy and q is heat added to the system

Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: delta H vs q

Delta H is the change in enthalpy, while q is just heat, so it doesn't represent a change.

Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

Re: delta H vs q

Delta H is the change in enthalpy and q represents heat.

Alexandra Albers 1D
Posts: 61
Joined: Fri Sep 28, 2018 12:18 am

Re: delta H vs q

In some cases, such as that of delta U, particularly in biological reactions, qp and delta H can be equal because the there is not work due to expansion, meaning that delta U=delta H.

AngelaZ 1J
Posts: 65
Joined: Fri Sep 28, 2018 12:23 am

Re: delta H vs q

Change in enthalpy (delta H) is the amount of heat (q) absorbed or released at constant pressure.

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

Re: delta H vs q

When pressure is constant, q becomes qp and this is equal to .

George Ghaly 2L
Posts: 66
Joined: Fri Sep 28, 2018 12:29 am
Been upvoted: 1 time

Re: delta H vs q

Delta H represent the heat that changed in reaction, while q represents the heat.

Posts: 33
Joined: Fri Sep 28, 2018 12:22 am

Re: delta H vs q

How exactly do you solve for delta H?

Kathryn 1F
Posts: 66
Joined: Fri Sep 28, 2018 12:19 am

Re: delta H vs q

Rami_Z_AbuQubo_2K wrote:When pressure is constant, q becomes qp and this is equal to .

Why is this? How does keeping the pressure constant equal to enthalpy? Thanks!

Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 2 guests