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Phys 4B Fall 2017  Homework  Phys 4B F17 Hwk 6
Please find attached the solution for Phys 4B F17 Hwk 6
Thermodyanamics
1) A gas changes its state quasistatically from A to C along the paths shown in the figure below. The work done by the gas is
2) When 23 cal of heat are absorbed by a gas, the system performs 25 J of work. What is the change in the internal energy of the gas?
3) An ideal gas is allowed to expand isothermally until it reaches its final volume. It is then heated at constant volume until it reaches its final pressure. The initial state of the gas is P1 = 3.25 atm, V1 = 1.00 L, and Eint 1 = 470 J, and its final state has volume V2 = 3.25 L and Eint 2 = 974 J.
a) Calculate the work done by the gas. Be careful with signs: if the work you calculate turns out to be, for example, 50 J in our sign convention, this means that 50 J of work were done by the gas.
b) Find the heat absorbed by the gas during this process.
4) The PV diagram below represents 3.25 mol of an ideal monatomic gas. The gas is initially at point A. The paths AD and BC represent isothermal changes. If the system is brought to point C along the path ABC, find the following:
(Detail Question attached )
5) The PV diagram below represents 3.25 mol of an ideal monatomic gas. The gas is initially at point A. The paths AD and BC represent isothermal changes. If the system is brought to point C along the path ADC, find the following:
(Detail Question attached )
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