## Delta H given

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

505095793
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

### Delta H given

Why is it that when delta H is given in a thermodynamics question that this implies constant pressure?

Jane Burgan 1C
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

### Re: Delta H given

Delta H is the change in enthalpy, and the definition of enthalpy is that it is heat released or absorbed under constant pressure. So, when you're given delta H you know that there's constant pressure.

Kyither Min 2K
Posts: 60
Joined: Wed Oct 03, 2018 12:15 am

### Re: Delta H given

It is because the definition of delta H is the change in enthalpy of a reaction under constant pressure. Therefore, you know when delta H is given, the reaction took place under constant pressure.