- #1
Soren4
- 128
- 2
I came up with a basic doubt on heat exchange. Consider this example situation.
A cube of ice of mass ##m## and at temperature ##\theta <0°C## is put in contact with a resevoir exactly at the temperature ##T=0°C##.
The question is: does the ice melts, i.e. does the ice pass to liquid state? Or it will stay at solid state, but at new temperature ##T=0°C##?
Of course the ice reaches the temperature##T=0°C## and I'm totally ok with that. But once it reached that temperature?
On the one hand ice (solid state) already has the same temperature of the resevoir, so temperature gradient is zero, therefore there is no heat flow and ice should remain ice (it should not become water). So I'm quite convinced that this is the right one.
But on the other hand I found a similar exercise in which the involved material actually melts when in conctact with a reservoir at the temperature of melting.
Wich of the two is correct?
A cube of ice of mass ##m## and at temperature ##\theta <0°C## is put in contact with a resevoir exactly at the temperature ##T=0°C##.
The question is: does the ice melts, i.e. does the ice pass to liquid state? Or it will stay at solid state, but at new temperature ##T=0°C##?
Of course the ice reaches the temperature##T=0°C## and I'm totally ok with that. But once it reached that temperature?
On the one hand ice (solid state) already has the same temperature of the resevoir, so temperature gradient is zero, therefore there is no heat flow and ice should remain ice (it should not become water). So I'm quite convinced that this is the right one.
But on the other hand I found a similar exercise in which the involved material actually melts when in conctact with a reservoir at the temperature of melting.
Wich of the two is correct?