Chapter 6, Problem 6.44P

3kg of Co2 expanded in a stationary piston cylinder through a polytropic process from 30 degree Celsius and 250 kpa to 100kPa pressure. If the polytropic exponent, n = 1.45, find the total work, total heat transferred, total kinetic energy change and internal energy change

Number 3

ESL-2 150 grams of water at 20.0°C in a pan is places in an oven that is at a constant 100.0°C. a) Starting with AS-dQr/T, clearly explain all steps – evaluating the integral and finding the mumerical value - to find the total change in entropy for the original H20 to go from 20.0°C to become steam at 100.0°C. b) Starting with AS-dQr/T, clearly explain all steps- evaluating the integral and finding the numerid value to find the change in entropy for the oven interior for this entire process. c) Find the total change in entropy for the universe for this entire process. (Neglect the change due to the warming of the pan). Use this answer to explain whether this process is reversible or irreversible.

A piston/cylinder has a water volume separated in VA = 0.3 m³ and VB = 0.4 m by a stiff membrane. The initial state in A is 1000 kPa, x = 0.8 and in B it is 1500 kPa and 250°C. Now the membrane ruptures and the water comes to a uniform state at 200°C. What is the final pressure? Find the work and the heat transfer in the process. Po mp cb A:H2O B:H20

A pressure cooker 6 ltr

Thermodynamics: Please show me how to solve the given practice problems in step by step solution.

EXERCISES ON PROPERTIES OF STEAM 3). Ten kg of water 45 °C is heated at a constant pressure of 10 bar until it becomes superheated vapour at 300°C. Find the change in volume, enthalpy, internal energy and entropy.

A piston with water vapor at a pressure of 300 kPa and a temperature of 175 oC. 20 kg of fluid is compressed up to 950 kPa pressure in the cylinder arrangement. Piston cylinder device to a heat well at 80 oC in order to keep the temperature of the water in it constant. The heat generated during compression is discarded. a) What phase is the water in the first case? In the last case, what phase is the water in? b) Find the entropy change in water by the process. c) From the cylinder, assuming that the process is a reversible process at constant temperature. Calculate the amount of heat absorbed. d) Find the entropy change of the heat well. e) Consider the total entropy change including the piston-cylinder mechanism and the heat indicate whether the transaction is reversible or irreversible when received. f) T (° C) -s (kJ / kgK) and P (Pa) - by specifying the state change saturation curves and values Show in (m³ / kg) diagrams.

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