An ideal gas at a given state expands to a fixed final volume first at constant pressure and then at constant temperature. For which case is the work done greater?

A spring-loaded piston-cylinder device contains of m=1kg carbon dioxide. Initially, the spring has no force on the piston and P₁ = 500kPa, T₁ = 150K, V₁ = 0.1m³. Heat is transferred to the gas, causing the piston to rise and to compress the spring. At the state 2, T₁₂=900K, V₂=0.3m³. The gas is an ideal gas. (11) Calculate the heat transferred into the system in P1, V1, T1 P2, V2, T2 in kJ?

Through an isentropic process, a piston compresses 2 kg of an ideal gas at 150 kPa and 35C in a cylinder to a pressure of 300 kPa. The specific heat of the gas for constant pressure processes is 5 kJ/kg-K; for constant volume processes, the specific heat is 3 kJ/kg-K. What is the final temperature of the gas in degree Celsius? (Show step by step solution and good handwritten)

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Saved Determine tne change in the internal energy of hellum, in kJ/kg, as it undergoes a change of state from 100 kPa and 20°C to 600 kPa and 300°C using the equation of state P(v- a) RT where as 05 m/kg and the ideal gas equation of state. Use data from the tables. The change N Nnternal energy of hellum for the equation of state is kJ/kg and for the Ideal gas equation of state is jkJikg.

A spring-loaded piston-cylinder device contains  of m=1kg carbon dioxide. Initially, the spring has no force on the piston and  , , . Heat is transferred to the gas, causing the piston to rise and to compress the spring. At the state 2,  , . The gas is an ideal gas. (7)How to calculate the total boundary work ?_____     A.     B.     C.     D.

A piston-cylinder device contains air initially at 350 kPa, 650 K and 0.4 m3 undergoes a thermodynamic cycie as follows: 1 -2: A compression process from initiai volume ta 0.2 m3. This processfollows polytropic law, PV 1.25 constant. 2 -3: An isobaric expapsion process to 0.4 m3. 3 - 1: An isoihoric process to the initial pressure.   i) Determine the pressure at state 2 and 3kPa.ii) Calculate the mass of air, kg.iii) Sketch the cycle on a P-v diagram and label all pressures and volumes.iv) Calculate the temperatures at state 2 and 3, K.v) Determine the net work fcr the entire cycle, kJ.vi) Calcuiate the heat transfer for each process, kJ Assume air as an ideal gas, take R = 0.287 kJ/kg.K and Cv=0.718 kl/kg.K.

A rigid tank contains saturated liquid and vapur mixture of Refrigerant -134a at 26^o C.

Q2 (a) A polytropic process is defined as PV" = C , where n is polytropic index and C is a constant. Derive the equation for a boundary work of an ideal gas undergoing a polytropic process at the isothermal condition.

Mr Luda wants to understand further about a newly created gas. The gas is initiallyat a pressure of 90 kPa, volume of 1.258 m3 and temperature of 10°C (State 1).The gas undergoes a 3-step process in which it is first compressed isothermally toa pressure of 400 kPa and volume of 0.283 m3 (State 2), then expanded at constantpressure back to its original volume (State 3). Finally, the gas is returned to itsoriginal State 1 by cooling at constant volume.a) Sketch the cycle of this system on a P – V diagram.b) Calculate the work done (in kJ) for each process step.c) Determine the total work done for the three-process cycle.d) State whether the work done is on or by the system.