A spherical vessel used as a reactor for producing pharmaceuticals has a 5-mm-thick stainless steel wall
(a) The exterior surface of the vessel is exposed to ambient air
(b) Explore the effect of varying the convection coefficient on transient thermal conditions within the reactor.
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Introduction to Heat Transfer
- Krypton in a closed system is compressed adiabatically from 74 K and 1 bar to a final pressure of 24 bar. What is the final temperature in K? Assume krypton is an ideal gas. From Appendix B in the text, we can assume the heat capacity of krypton is independent of temperature and CP=2.5R , where R is the molar gas constant R=8.314 J/(mol K). For an ideal gas, recall CV=CP−R=1.5R. Report your answer in units of K using three decimal places.arrow_forwardWhen a system undergoes a constant volume process (P = 5 bar), the change in internal internal is 5 kJ and temperature during the process is 15°C. Then its change in entropy would be approximately 17.36 J/kgK Select one: O True O Falsearrow_forwardWe have 1 m^3 of air (ideal gas), at the pressure p_1 = 10 atm, it undergoes an expansion at constant temperature; the final pressure is p_2 = 1 atm. Determine the work exchanged by the gas with the external environment in the course of this expansion, as well as the amount of heat exchanged with the external environment.arrow_forward
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- Krypton in a closed system is compressed adiabatically from 94 K and 1 bar to a final pressure of 24 bar. Compute the required work. Assume krypton is an ideal gas. From Appendix B in the text, we can assume the heat capacity of krypton is independent of temperature and CP=2.5R , where R is the molar gas constant R=8.314 J/(mol K). For an ideal gas, recall CV=CP−R=1.5R. Report your answer in units of kJ/mol using three decimal places.arrow_forward4. One mole of helium gas is injected into each side of a slidable, airtight lead piston that separates two chambers of a sealed cylinder. The outside of the cylinder is insulated everywhere except where noted below. The cylinder and piston have lengths and cross- sectional area labeled in the diagram. The helium in the left chamber is heated from outside at a rate of 450 W, and the helium in the other chamber expels heat into a cool region. The full system eventually comes to steady-state. When it reaches steady state, the force needed to hold on the end cap is measured to be 18,000 N, and the piston has slid to an equilibrium point that is a distance à from the left end. force holding cap = 18,000N pressure. cross-sectional area of cylinder = 0.02m² x = ? Imol He do dt = +450W 45cm 15cm lead piston a. Find the temperature difference of the two chambers. b. Find the distance x. dQ dt Assume helium behaves as an ideal gas, and that heat transfer through the container walls is…arrow_forwardWhen 1 kg of coal is burned in the boiler, 10 m3 of exhaust gas is formed, the volume ratios of which are given below. With 220 C from the chimney If the exhaust gas released is reduced to 20 C, find the heat to be saved from each kg of coal according to the method you want? H20 4.55% ; 02 6.71%; CO2 11.83%; N2 76.9% and for all gases V=22.4 m3arrow_forward
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