## internal energy

Kyle Rex 1K
Posts: 50
Joined: Sat Aug 17, 2019 12:16 am

### internal energy

When calculating internal energy changes, is that the deltaU equation or q?

AKhanna_3H
Posts: 104
Joined: Wed Sep 18, 2019 12:19 am

### Re: internal energy

Internal energy is represented by delta U. Q represents the heat entering or exiting the system.

Uisa_Manumaleuna_3E
Posts: 60
Joined: Wed Sep 21, 2016 2:56 pm

### Re: internal energy

Yup, internal energy is the delta u = q + w. just remember, if the reaction has a constant volume, then no expansion work is done, and delta u is equal to q subscript v.

Hailey Kim 4G
Posts: 110
Joined: Sat Jul 20, 2019 12:16 am

### Re: internal energy

The change in internal energy is represented by delta(U). Delta(U) is equal to the energy transferred by heating (q) + the energy transferred by compression (w).

delta U = q + w

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

### Re: internal energy

The equation for calculating internal energy is u= q + w.

CynthiaLy4F
Posts: 103
Joined: Sat Jul 20, 2019 12:16 am

### Re: internal energy

Calculating internal energy corresponds to the deltaU equation, where deltaU = q + w.

HuyHa_2H
Posts: 100
Joined: Wed Sep 11, 2019 12:15 am

### Re: internal energy

Delta U is the internal energy. Q represents heat. Utilizing the two is through the equation: Delta U = q + w where w is the net work.

AniP_2D
Posts: 95
Joined: Sat Aug 17, 2019 12:17 am

### Re: internal energy

The equation you use for internal energy is deltaU=q+w.

Frank He 4G
Posts: 50
Joined: Tue Nov 12, 2019 12:19 am

### Re: internal energy

Hailey Kim 4G wrote:The change in internal energy is represented by delta(U). Delta(U) is equal to the energy transferred by heating (q) + the energy transferred by compression (w).

delta U = q + w

This is good to note. Delta U is importantly not just internal energy but the change in internal energy. We are calculating the change, rather than the actual total internal energy of an entire system.

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Re: internal energy

Also, heat and work are equivalent means of energy transfer and are the only to change the internal energy of a system.

RichBollini4G
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

### Re: internal energy

AKhanna_3H wrote:Internal energy is represented by delta U. Q represents the heat entering or exiting the system.

Thank you

AveryAgosto
Posts: 76
Joined: Wed Sep 18, 2019 12:16 am

### Re: internal energy

Internal energy is found using the delta U equation which will contain q.