00:01
For question a, what's the initial temperature of the water? so we'd like to find our initial temperature.
00:09
So at p1 is equal to 800 kpa, our temperature 1 is 170 .41 degrees celsius, since it's liquid and vapor.
00:20
So that's our initial temperature of our water.
00:23
What's the initial total energy of the water mixture? so we set u initial is equal to u final plus x u .u.
00:35
So plugging in values, we have u is equal to 719 .9 plus 0 .3 times 1856 .1 .1.
00:47
So this is equal to 1276 .8 kilojoules per kilogram.
00:54
So for b, our u, our energy, is equal to m times u, or 0 .6 times 1276 .8, which is 766 kilojoules.
01:13
For part c, we would like to find what's the final volume? to find our final volume, we have h2, which is 3162 .2 .2 kilojoules per kilogram.
01:28
So v is m times v2, which is 0 .6 times 0 .3544, and so our volume is 0 .2126 meters cubed.
01:43
For our, for our volume is 0 .216 meters cubed...