2
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enter image description here

This is isotherm of a real gas is represented as shown in diagram at three temperature . In my book it is written that in ACIH gas liquid transition will involve only one phase throughout .

But I could not understand how this can be possible as at A it would be gas while at H it would be liquid .

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  • $\begingroup$ What's unclear about that? Do you know what a critical point is (and where is it on your picture, BTW)? $\endgroup$ – Ivan Neretin Apr 19 '17 at 16:07
  • $\begingroup$ @IvanNeretin point F $\endgroup$ – search Apr 19 '17 at 16:31
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    $\begingroup$ Good. Then again, what's unclear? You have a field with a fence, and the fence is not infinite; it has an end somewhere far away. You want to get to the other side of the fence. To climb over it, or to walk around it, that's the question. $\endgroup$ – Ivan Neretin Apr 19 '17 at 20:56
  • $\begingroup$ @IvanNeretin I mean at H ,I it will be liquid while at A ,C it will be gas . So in the book how they have written there is no phase transition. $\endgroup$ – search Apr 20 '17 at 4:15
  • $\begingroup$ They have written so because this is true. If you go A-D-E-G, you climb over the fence. If you go A-C-I-G, then you walk around the fence. $\endgroup$ – Ivan Neretin Apr 20 '17 at 5:44

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