For the process shown in the figure below, answer questions 7, 8, and 9 when the system consist of mass of 3 kg of nitrogen. 425 375 80 Q7 - Calculate the total work for process 1-2 1 0.4 v. m³/kg
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- The temperature of an ideal gas is raised from 298 K to 402 K in a process that increases the heat content of the gas by 1000 J. What is the = -R for the gas, and these are constant. Hint: It will be 2 work performed on the system by this process? Assume that c 'y helpful to evaluate AU for this process. 3 =-R and C RFor the heat pump (used for heating) illustrated below, what is its coefficient of performance for heating. Ag? The gas is monatomic. p(Pa) 6 A. 8/3 B. 2 C. 11/3 D. 14/3 E. 19/7 2 V(m³) 34Suppose that Process B and Process C, each have a lower specification limit (LSL) of 2, and an upper specification limit (USL) of 10. Then: a. Process B is cappable. b. Process C is cappable. c. Both Process B and Process C are cappable. d. Neither process B nor Process C is cappable.
- from the pint uwe the PV diagram of the Qvestion: Name the three prolesses. three processes, Р (Рa) B T2 V (m³) a) what ty pe of process A D what ty pe of process c) What ty pe of process A รพer Iso ther mal process Adjabatic process I sovolumetric process I so baric process Cy clic process Iso choric processQ1. A Carnot's engine is operated between two reservoirs at temperatures of 450 K and 350 K. If the engine receives 1000 Calories of heat from the source in each cycle, calculate the amount of heat in Joules rejected to the sink in each cycle. Calculate efficiency of the engine and the work done in each cycle. (1 calorie = 4.2 Joules).1. An engineer does 3250 joules of work and discards 5750 joules of heat. Find the efficiency of this engine.2. A brass lid of an ordinary glass jar was stacked at 25°C. The jar was placed in water at 80°C. Find the difference in their diameters if the initial diameter of the jar is 8.00 cm.
- Refer to the figure on the right for nos. 6 – 8. Plam) 60 6. Which point does a certain gas approached the lowest temperature in the process? 0.40 A. state a B. state b C. state e D. state a and b 0.20 7. How much work was done by or on the gas from a to c? (Note: Im-1000L, I atm= 101.325kPa) V(L) 20 40 60 C. 1.2 kJ 8. If 1215 J of heat was put into the gas during state a-b, how many of those joules went to internal energy? C. 1377 J A. 0.152 kJ B. 0.162 kJ D. 0kJ A. -1215 J B. 1215 J D. 1053 J 9. If a 1.00 kg of water at 100C is placed in thermal contact with Ikg of water at OC, what is the change in the entropy assuming c, of water 4190 J/kg K. A. -603 J/K B. 705 J/K C. 102 J/K D. 1308 J/K 10. This statement tells that no cyclic process can be converted completely into work. This is applicable in what thermodynamic setup. A. Heat Engine B. Carnot Engine C. Refrigerator D. Heating I1. In the steady-state condition of water pipe analogy, the amount of mass inside pipe is constant. This…In the figure below you see the process done by 9.0 moles of an ideal gas with adiabatic constant 1.60. What is the efficiency of this engine? РА 300 K 500 K a adiabatic process 0.20 m³1. The formula for work in thermodynamics is given by PV = W. Suppose that at any pressure, P = h(V + V,") where V is the volume and V, is the initial volume. h and V, are constants. If work is to be maximized, what is the correct expression of maximum work in terms of constants? A. -1/2V. B. -h/2V. C. A(V, + 1)/4V, D. -h/4 E. None of these. A B.
- 1. What is the efficiency of a steam engine if it absorbed an energy of 2.5 x 10$ J from the boiler and gives up 1.5 x 10ºJ in exhausting during one cycle? Solution: Answer:B- The gas in an internal combustion engine initially at temperature of 1250°C expands polytropically to five times its initial volume and( 1/6) its initial pressure. Calculate 1-The index of expansion n. C m onters aOne kilogram of helium in an insulated piston/cylinder at 47°C and 1000 kPa is expanded in a reversible process to 500 kPa, as shown in the above figure. Find a) the final temperature of helium gas and b) the final volume of helium gas. Helium is an ideal gas with constant specific heats. (for helium R-2.0769 kJ/kg-K, C.-5.1926 kJ/kg-K, c.-3.1156 kJ/kg-K).