73 Figure P2.73 shows a power cycle executed by a gas in a piston-cylinder assembly. For process 1-2, U₂ - U₁= 15 kJ. For process 3-1, Q₁1 = 10 kJ. There are no changes in kinetic or potential energy. Determine (a) the work for each process, in kJ, (b) the heat transfer for processes 1-2 and 2-3, each in kJ, and (c) the thermal efficiency.

8. An ideal monatomic gas expands isothermally from A to B, as the graph shows. What can be said about this process? (a) The gas does no work. (b) No heat enters or leaves the gas. (c) The first law of thermo- dynamics does not apply to an isothermal process. (d) The ideal gas law is not valid during an isothermal process. (e) There is no change in the internal energy of the gas. Isotherm B Volume Pressure

3600 J of work are done on a container of Argon gas compressing it down from its original state of 1.2 atm, 0.04 m , 19°C. If the gas warms to 110°C how much heat in Joules must enter or leave the system? Heat entering is +, heat leaving is-. Q = %3D

A certain gas is compressed adiabatically. The amount of work done on the gas is 800 J. What is the change in the internal energy of the gas? Question 4 options:   400 J   More information is needed to answer this question.   0 J   -800 J   800 J     For vapor water at 2°C Question 5 options:   Cp < Cv.   Cp > Cv.   Cp = Cv.   More information is needed to answer this question.

8.4 A cylinder is equipped with a tight - fitting but easily movable piston. The cylinder contains 2.0x10^-4 m^3 of gas with normal air pressure. With a bunsen burner, the cylinder is heated until ga - then doubled its volume. a) Calculate how much work the gas does during the expansion b) How much does the internal energy change during the expansion of the gas have 5 degrees of freedom? c) How much heat has been added to the gas during the expansion?\

An ideal gas is taken through a quasi-static process described by P = ?V2, with ? = 6.00 atm/m6, as shown in the figure. The gas is expanded to twice its original volume of 1.00 m3. How much work is done on the expanding gas in this process? MJ

1. During the isobaric expansion from A to B represented below, -110 J of heat is removed from the gas. p (N/m²) 1.0 x 104. A B 0.15 0.30 V (m³) (a) Calculate the work done by the gas during expansion from A to B. WAB = ✓ J (b) What is the change in its internal energy? ΔΕint - VJ What Law of Thermodynamics did you use in part (b)? A

13. The temperatures To of the cold reservoirs and the temperatures T, of the hot reservoirs for four Carnot heat engines are engine 1: Tc = 400K and T₁ = 500K engine 2: T = 500K and T₁ = 600K engine 3: Tc = 400K and T₁ = 600K engine 4: Tc = 600K and TH = 800K Rank these engines according to their efficiencies, least to greatest. A. 1, 2, 3, 4 B. 1 and 2 tie, then 3 and 4 tie C. 2, 1, 3, 4 D. 1, 2, 4, 3 E. 2, 1, 4, 3

A gas is taken through the cyclic process shown in the figure. For one complete cycle, how much heat Q is transferred to the system given the points of interest shown in the chart? Pressure (Pa) Volume (m³) P = 3440 И 3 3.20 P3 9270 V2 7.35 Volume (m) 2. 3. Pressure (Pa)

An ideal gas in a container with a sliding piston is held at atmospheric pressure. Heat is added and the volume increases from 1 m^3 to 3 m^3. The initial temp of the gas is 0 degrees celcius.  Question A: How many moles of gas are in this container?  Question B: How much work does the gas perform on the piston? Please answer in J Question C: What is the final temperature of the gas? Please answer in degrees celcius Question D: what is the change in internal energy of the gas? Please answer in J  Question E: How much heat was added to the gas? Please answer in J