Chapter 6, Problem 6.42CU

What is the efficiency of this cycle? O 0.42 0.58 0.28 1.00 O 0.72

stream? Q2/ An ideal gas initially at 600 K and 10 bar undergoes a four step mechanically reversible cycle in a closed system. In step 1-2, pressure decreases isothermally to 3 bar; in step 2-3, pressure decreases at constant volume to 2 bar; in step 3-4, volume decreases at constant pressure; and in step 4-1, the gas returns adiabatically to its initial state. Assum C₂=(7/2) R and C₂ = (5/2) R. Calculate Q, W, AU, and 4H for each step of the cycle?

Two closed thermodynamic cycles are illustrated in the figure.(Figure 1) The ideal gas sample can be processed clockwise or counterclockwise through either cycle. Imagine processing the gas clockwise through Cycle 1. Determine whether the change in internal energy of the gas in the entire cycle is positive, negative, or zero. Imagine processing the gas clockwise through Cycle 1. Determine whether the work done by the gas in the entire cycle is positive, negative, or zero. Imagine processing the gas clockwise through Cycle 1. Determine whether the heat energy transferred to the gas in the entire cycle is positive, negative, or zero.   Imagine processing the gas clockwise through Cycle 1 and then counterclockwise through Cycle 1. Compare these two processes on the basis of the work done by the gas in the entire cycle. WclockwiseWclockwiseW_clockwise for Cycle 1 > WcounterclockwiseWcounterclockwiseW_counterclockwise for Cycle 1 WclockwiseWclockwiseW_clockwise for Cycle 1 =…

8Q Prove that, whenever a system undergoes a cycle, p<0 (b) T.

Answer true (T) or false (F) as appropriate1. Entropy is a measure of irreversibilities in processes.2. The entropy of the universe must always decrease.3. The thermal efficiency of a Carnot engine is the maximum possible.4. The gas turbine operates on the Rankine cycle.5. The steam turbine operates on the Brayton cycle.

2. The work required to compress a gas reversibly according to pV130 = C is 67,790 J, if there is no flow. Determine AU (in kJ) and Q (in kJ) if the gas is methane. For methane, k = 1.321, R = 518.45 J/kg-K, cv = 1.6187, cp = 2.1377 J/kg-K please draw the P-V and T-S diagrams

It's a thermodynamics question.

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When 1 kg of coal is burned in the boiler, 10 m3 of exhaust gas is formed, the volume ratios of which are given below. With 220 C from the chimney If the exhaust gas released is reduced to 20 C, find the heat to be saved from each kg of coal according to the method you want? H20 4.55% ; 02 6.71%; CO2 11.83%; N2 76.9% and for all gases V=22.4 m3