## 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 $\Delta H$ 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
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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 $\Delta h$.

George Ghaly 2L
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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
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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 $\Delta h$.

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

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