Find the missing properties of u, h, and x for water at 120◦ c, v = 0.5 m3 /kg
b. water at 100◦ c, p = 10 mpa
c. nitrogen at 100 k, x = 0.75
d. nitrogen at 200 k, p = 200 kpa
e. ammonia at 100◦c, v = 0.1 m3 /kg

Write a question about how changing temperature affects the gas inside the sports ball

Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m · k is used to store hot water and to keep it at 100°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100°c this tank can supply steadily if the cold water enters at 20°c.

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