## Irreversible reactions and temperature

$\Delta U=q+w$

Jessica Li 4F
Posts: 115
Joined: Fri Aug 09, 2019 12:16 am

### Irreversible reactions and temperature

Can you have an irreversible reaction that involves no change in temperature or delta U, or could you have a reaction at constant temperature but a nonzero value for delta U?

For instance, 4.17 is at constant temperature but delta U does not equal to 0.

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

### Re: Irreversible reactions and temperature

It is possible to have a reaction where the temperature change is 0 but delta U is constant. Work and heat both affect temperature, so if their effects on temperature cancel out you could technically have a situation where there is no temp. change.

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

### Re: Irreversible reactions and temperature

An example of this would be solid vs liquid of the same material. Inputting energy into the system will make the solid turn to liquid, but they can be the same temperature.

705302428
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

### Re: Irreversible reactions and temperature

Yes it is possible.