Chapter 6, Problem 6.48P

A rigid cylindrical tank stores 80 kg of a substance at 400 kPa and 480 K while the outside temperature is 290 K. A paddle wheel stirs the system transferring shaft work at a rate of 0.7 kW. At the same time an internal electrical resistance heater transfers electricity at the rate of 1.6 kW. A. Do an energy analysis to determine the rate of heat transfer for the tank. B. Determine the absolute value of the rate at which entropy leaves the internal system (at a uniform temperature of 480 K). Answer in kW/K C. Determine the rate of entropy increase in the system's surroundings. Answer in kW/K

Based on this question, can you explain in words the theory behind the second law of thermodynamics with this question and how it is solved? Thank you

Steam at a pressure of 11 bar and a temperature of 320 °C is contained in a large vessel. Connected to the vessel through a valve is a turbine followed by a small initially evacuated tank with a volume of 0.60 m³. When emergency power is required, the valve is opened and the tank fills with steam until the pressure is 11 bar. The temperature in the tank is then 400 °C. The filling process takes place adiabatically and kinetic and potential energy effects are negligible. Determine the amount of work developed by the turbine in kJ.

5. Steam undergoes a temperature heat addition process initially at 200 Kpa and 60% quality to 200 C. Determine the following: A. heat addition B. work done C. change in entropy 6. Steam undergoes a constant volume heat addition process initially at 200 KPa and 60% quality to 200 C. Determine the following: A. heat addition B. work done C. change in entropy

An ideal gas undergoes a process from state 1 ( the properties are T₁ = 300 K, p₁ = 100 kPa) to state 2 (the properties are T₂ = 600 K, p₂ = 500 kPa). The specific heats of the ideal gas are: c = 1 kJ/kg-K and c = 0.7 kJ/kg-K.. The change in specific entropy of the ideal gas to two decimal places)from state 1 to state 2 (in kJ/kg-K) is......

D2

ASAP

0.05 kg of a certain gas in a piston and cylinder is compressed reversibly until the pressure reaches 0.615 MPa. The initial pressure and volume were 0.1025 MPa and 0.03 m3 respectively. Determine the final temperature, the work done on the gas, the heat flow to or from the cylinder walls. i) When the process is according to law PV1.4 = C, ii) When the process is isothermal. iii) When the process takes place in a perfectly thermally insulated cylinder. (the molecular weight of a certain gas is 44 and y = 1.3).

Calculate the amount of work necessary for the reversible compression of steam from 1 bar to 10 bar. The compression is to take place in a cylinder fitted with a weightless piston at the constant temperature of 500 oC. Under these conditions we have a superheated vapor. Assume that steam may be treated as an ideal gas. Report your answer in units of kJ/kg using three decimal places. For conversion, note that the molar mass of water is 18.015 g/mol.