A fuel is burned in a cylinder equipped with a piston. The initial volume of the
ID: 491102 • Letter: A
Question
A fuel is burned in a cylinder equipped with a piston. The initial volume of the cylinder is 0.0325 m^3. The piston expands against a constant pressure of 1.25 middot 1065 Pa. The amount of the expansion work is -68 7.5 J. The final volume of the cylinder is: 0.0055 m^3 0.0270 m^3 0.0380 m^3 0.1493 m^3 0.2143 m^3 3.3750 m^3 4.0625 m^3 None of the above; the final volume is _____m^3. In a certain process carried out at a constant pressure of 1 atm (101325 Pa), a system absorbs 151 J of heat from its surroundings and does 53 J of work on the surroundings. In this process, the change in internal energy, delta E, is _____J, and the change in enthalpy, delta H, is _____J. The molar heat capacity of uranium (U) is 27.665 J-mol^-1middot K^-1. The atomic weight of uranium is 238.0289 g mol^-1. The amount of heat required to heat a uranium fuel rod weighing 1748 g from 25.0 degree C to 280.0 degree C is: 29.6 J 1873 J 51806 J 56885 J 107300 J 112739 J 3835135 J 12331397 J None of the above; the correct amount of heat is _____JExplanation / Answer
Q8.
V1 = 0.0325 m3
P = 125*10^5 Pa
W = -687.5 J
finf Vfinal:
W = -P*dV
W = -(1.25*10^5)(Vf-0.0325)
-687.5 = -(1.25*10^5)(Vf-0.0325)
Vf = 687.5/(1.25*10^5) + 0.0325
Vf = 0.038 m3
nearest answer is C
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