Delta U

$\Delta U=q+w$

305113590
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Joined: Fri Sep 28, 2018 12:28 am

Delta U

What does a negative and positive delta U value tell us?

Elaine Pham 2E
Posts: 58
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: Delta U

A positive delta U means the internal energy of the system you are looking at has increased while a negative delta U means internal energy of the system has decreased.

Edward Xie 2E
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Re: Delta U

Positive delta U means an increase in the internal energy of the system, while negative delta U is a decrease in the internal energy.

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Re: Delta U

$\Delta U$ represents the change in internal energy.
A positive $\Delta U$ tells us that the internal energy of gas has increased (usually because the temperature increased and the molecules are moving faster.)
A negative $\Delta U$ tells us that the internal energy of gas has increased (because the temperature has decreased and the molecules have slowed down.)

Kavvya Gupta 1H
Posts: 35
Joined: Fri Sep 28, 2018 12:21 am

Re: Delta U

a positive delta u means in an increase in the internal energy due to an increase in temperature
a negative delta u means in a decrease in the internal energy due to a decrease in temperature

daniella_knight1I
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Delta U

Positive value means an increase in internal energy while a negative one means a decrease.

Brian Hom 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Delta U

Delta U is the change in internal energy and it is a state property. A positive delta U value tells us that Ufinal is greater than Uinitial or the system gained energy. A negative delta U tells us that Ufinal is less than Uinitial or the system has lost energy.

Yiting_Gong_4L
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: Delta U

Delta U is the change in internal energy. If it is positive that means the internal energy is increasing while a negative means decreasing.