 Now, at this stage, let me quickly go through the next part, although it is called properties of fluid, it is essentially introduction to steam tables and Wanderwald's gases. I will not spend time on this because this is one part I think for which you are perfectly on your home grounds because most of you have taught not only thermodynamics but I am sure you have taught energy conversion, steam power plants and so on. So, you would have used the steam tables the way a good high school science student uses locked tables. So, one exercise I would like you to do is the following. I had asked you to have with you the steam tables which you use in your institute. I hope you have them with you. I have given you, I think all of you will have a copy of this steam table now. So, just spend some time not immediately but say today evening comparing the two, not value for value that is not an issue, the values will be slightly different. But check for whether what is the range of pressures temperature explored in this steam table, what is the range of pressure temperature explored in that table. You will find that in this table the compressed liquid state or the subcooled liquid state is not very nicely presented. If you come to table 3, superheated steam table say come to page 11, you will notice that there are blanks for the 50 degree C and 100 degree C columns. These blanks exist because if you say you take 100 degree C and 1.5 bar. We know that at 100 degree C and 1.5 bar the steam will not be superheated, it will be subcooled water or compressed water. If you look at it from the pressure point of view at 1.5 bar the saturation temperature is 111.4 Celsius. So, at 100 degree C it will be subcooled water or if you look at 50 degree C, at 50 degree C the saturation temperature if you look up is 0.1235 bar, so at 1.5 bar it is compressed liquid or subcooled liquid. They could have tabulated those properties here, there are other tables where those are tabulated but here they are not tabulated. When you come to page 18, you have the tabulation in a different format and in a very crude tabulation, compressed liquid water and you have 6 blocks at different pressures of 50 bar, 100 bar up to 500 bar and in each block the 4 properties V, U, H and S are tabulated as a function of temperature. Then you will see there are blanks at the bottom where it will not be compressed liquid but it will be superheated. See in what way your table is different and if you have any issues with your table or this table we will discuss that. I am not claiming this is a dirt table to use but we find that it is a most convenient table to use. How many of you use this table at your institute? Are there earlier participants or coordinators here? I think that was done right. So shall we follow the same model this time? Because while solving problems everybody is at a uniform thing okay and if a few of you who compare this and find out that you are steam table different from this is better than this in some significant aspect. Do let me know tomorrow because we are open for replacing this by something else provided it is definitely better in some aspects right. See UFG is just an additional information you know in I tell my students that look U and H need not be given together they are given for convenience. If I remove all H values from here but give U values everywhere well it will be inconvenient but I can always determine H by saying U plus U okay. Now we have some 5 minutes for so I assume that 8 is done and along with 8 properties of fluids the first law part 2 that is page 5, page 6, page 7 these are recommended exercises not to be done immediately today evening but you should confidently be able to solve all these exercises before the main thing starts okay. And with each other and get that thing done.