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### delta H vs q

Posted: Sat Feb 02, 2019 9:25 pm
What is the difference between $\Delta H$ and q? How are they related?

### Re: delta H vs q

Posted: Sat Feb 02, 2019 9:28 pm
delta H is change in enthalpy and q is heat added to the system

### Re: delta H vs q

Posted: Sat Feb 02, 2019 9:59 pm
Delta H is the change in enthalpy, while q is just heat, so it doesn't represent a change.

### Re: delta H vs q

Posted: Sat Feb 02, 2019 10:12 pm
Delta H is the change in enthalpy and q represents heat.

### Re: delta H vs q

Posted: Sat Feb 02, 2019 10:16 pm
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.

### Re: delta H vs q

Posted: Sun Feb 03, 2019 3:06 pm
Change in enthalpy (delta H) is the amount of heat (q) absorbed or released at constant pressure.

### Re: delta H vs q

Posted: Sun Feb 03, 2019 7:32 pm
When pressure is constant, q becomes qp and this is equal to $\Delta h$.

### Re: delta H vs q

Posted: Sun Feb 03, 2019 8:56 pm
Delta H represent the heat that changed in reaction, while q represents the heat.

### Re: delta H vs q

Posted: Sun Feb 03, 2019 9:41 pm
How exactly do you solve for delta H?

### Re: delta H vs q

Posted: Sun Feb 03, 2019 9:50 pm
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!