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In which situation does delta U=0 and that q=-w
Posted: Sun Jan 28, 2018 8:05 pm
by Peter Dis1G
Can anyone explain this? Thanks in advance!
Re: In which situation does delta U=0 and that q=-w
Posted: Sun Jan 28, 2018 8:16 pm
by CameronJohari1J
The situation occurs when the system experiences isothermal change, thus delta U is zero. Subsequently, q=-w means that heat loss is equal work done on the system and visa versa is also true.
Re: In which situation does delta U=0 and that q=-w
Posted: Sun Jan 28, 2018 8:17 pm
by Peri Bingham 1G
The situation would be an isothermal (constant temperature) reversible expansion.
Re: In which situation does delta U=0 and that q=-w
Posted: Sun Jan 28, 2018 9:21 pm
by Anna Li 2E
U stands for internal energy, so when delta U (the change in internal energy) is zero, that indicates that reaction is isothermal, a.k.a there is no change in temperature. This occurs when q, (also known as heat added to the system) is equal to -w. You can view this -w as the system expanding of its own volition, not due to any outside influence.
Re: In which situation does delta U=0 and that q=-w
Posted: Sun Jan 28, 2018 9:57 pm
by Peter Dis1G
By the way,is the reversible work equation also used for isothermal situation only?