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@ramani-VR4O43 • May 28, 2012
@akashkasina-3OryfX • May 29, 2012
@nibhani-wLU5Ju • Jun 3, 2012
it is a closed system because it will transfer heat with surrounding but not transfer mass so it is a closed system...m.vivekanandanhot water kept in well insulated thermos flak is an example of closed system or isolated system??
@mechky-jbqpJD • Jun 3, 2012
In a closed system, no mass transfer takes place across the boundaries. Whereas in case of isolated system, neither mass nor energy transfer occurs across the system boundaries.m.vivekanandanhot water kept in well insulated thermos flak is an example of closed system or isolated system??
@zaveri-5TD6Sk • Jun 3, 2012
how can heat transfer take place through an insulated medium ?nibhaniit is a closed system because it will transfer heat with surrounding but not transfer mass so it is a closed system...
@akashkasina-3OryfX • Jun 3, 2012
assuming the thermos as 100% ideal,heat cannot be exchanged,even practically very small amount is exchanged,thats the reason why we use thermos flasks!!😀nibhaniit is a closed system because it will transfer heat with surrounding but not transfer mass so it is a closed system...
@mechky-jbqpJD • Jun 3, 2012
zaverihow can heat transfer take place through an insulated medium ?
Considering a real situation, heat transfer takes place across an insulated thermos flask. I am not aware of any flask in which you can put something warm and it will remain at that temperature forever. So indeed it is a closed system.akash.kasinaassuming the thermos as 100% ideal,heat cannot be exchanged,even practically very small amount is exchanged,thats the reason why we use thermos flasks!!😀
@nibhani-wLU5Ju • Jun 6, 2012
heat transfer can't takes place through an insulated meadium..but in practical life perfectly insulated meadium is not possible...zaverihow can heat transfer take place through an insulated medium ?
@mvivekanandan-OjHrf9 • Jun 10, 2012
@vikaskumar11233-J10JeV • Jun 10, 2012
@ramani-VR4O43 • Jun 10, 2012
If I were the examiner, I would mark it wrong. No vacuum flask is completely insulating.m.vivekanandanif this question is asked in exam , i will go with isolated system??
@nibhani-wLU5Ju • Jun 11, 2012
in ideal case it is an example of isolated system...but in practiacal case it is an example of a closed system because fask is well insulated not perfectly insulated....and perfectly insulaated system is not possible in this world..so ideally u can say that it is an isolated syastem but not practiaclly...m.vivekanandanhot water kept in well insulated thermos flak is an example of closed system or isolated system??
@mechky-jbqpJD • Jun 11, 2012
Yes, theoretically we assume it to be isolated system.m.vivekanandanif this question is asked in exam , i will go with isolated system??
@kedar-crbktt • Jun 25, 2012
@the-myth-buster-WdRWjO • Jun 25, 2012
@nibhani-wLU5Ju • Feb 13, 2023
if this question will be asked in exam you can give the same answer which i have given because it is an actual answer no one can say that its wrong...u can feel it in practical life...m.vivekanandanif this question is asked in exam , i will go with isolated system??
