## enthalpy

Renee Grange 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am
Been upvoted: 1 time

### enthalpy

What is enthalpy?

Deepika Reddy 1A
Posts: 125
Joined: Thu Jul 11, 2019 12:15 am

### Re: enthalpy

Enthalpy is the heat of the reaction. If it is negative, then the reaction is exothermic. If it is positive, then the reaction is endothermic.

005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

### Re: enthalpy

At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

Amy Pham 1D
Posts: 103
Joined: Fri Aug 09, 2019 12:15 am

### Re: enthalpy

Meredithe DeGuzman4G wrote:At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

Further, this is because at constant pressure the volume of reactants equals the volume of products, meaning that there was no expansion work in the reaction and the work term (w) in the equation equals zero.

Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

### Re: enthalpy

Enthalpy is the amount of heat absorbed or released by a reaction if there is no expansion work

005162902
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: enthalpy

Renee Grange 1I wrote:What is enthalpy?

Enthalpy is the heat entering or exiting the system. If the change in enthalpy (delta H) is negative then the reaction is exothermic. If the change in enthalpy is positive, then the reaction is gaining heat and therefore endothermic.

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: enthalpy

Furthermore, enthalpy is a state property, which means that it is not dependent on the path take to obtain that state. Therefore, you can add/subtract enthalpies to find the total change in enthalpy.

605395381
Posts: 50
Joined: Mon Jun 17, 2019 7:24 am

### Re: enthalpy

Enthalpy is the amount of heat released or absorbed when the rxn is at a constant pressure

Return to “Thermodynamic Systems (Open, Closed, Isolated)”

### Who is online

Users browsing this forum: No registered users and 2 guests