a) If the expansion is carried out isothermally and reversibly, calculate Q. W, AH and AU. Draw the process on a pV diagram. Label the axis and the path clearly. b) If the expansion is carried out adiabatically and reversibly, calculate Q, W, AH and AU. Draw the process on a pV diagram. Label the axis and the path clearly.

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State whether the following systems are open system or a closed system. Justify your answers. a) Condensor b) Heat Exchanger c) Refrigerator d) Compressor

This problem is (6.21) from a book  "Thermodynamics and Statistical Mechanics An Integrated Approach by M. Scott Shell"

Select all statements that apply to constant volume calorimetry.     A coffee cup calorimeter is used.     A bomb calorimeter is used.     The system is the reaction or process.     The system is the water plus the calorimeter.     The surroundings include the reaction or process only.     The surroundings include the water plus the calorimeter.     The temperature of the water will always increase.     The temperature of the water will always decrease.     The temperature of the water could increase or decrease.     It is used to measure heat of combustion.     It is used to measure heat of solution or reaction.

If there are no constraints, how would you conduct a stage-wise distillation column so as to bring its efficiency closer to unity?

Q1) A steel cylinder 10 cm in diameter and 10 cm long is initially at 300 °C. It is suddenly immersed in an oil bath that is maintained at 40 °C, with h =280 W/m² °C. Find: (a) The temperature at the center of the solid after 2 min, and (b) The temperature at the center of one of the regular faces after 2 min. Answers a) T = 175 °C b) T = 151 °C

Please try your best to show all steps

Examples for state functions are O a. Change in internal energy O b. Enthalpy O c. Work O d. Internal energy Clear my choice

A closed cycle is executed with helium as the working fluid. The flow rate through the device is m in = 1 kg/s.The cycle consists of four processes:1→2: Reversible, adiabatic expansion 2→3: Reversible, isobaric heat transfer to double the specific volume (i.e., v3/v2 = 2)3→4: Reversible, adiabatic compression back to the original pressure4→1: Reversible, isobaric heat transfer back to the original state a) Complete the following table and mention what the physical state of helium is in each step. Assume R= 2.077 for helium and k= cp/cv= = 5.1926/3.1156 = 1.6667. Detail the assumptions for each formula we are using for each box we fill.  b) show the states and process path on a P-v and T-s diagram.