Properties of energy 1 mol of an ideal gas at initial conditions p,-150 kPa, Vi-20 L...
By a reversible adiabatic expansion, temperature of an ideal gas (n mol) changed from T, to Ts Express the changes of the internal energy and enthalpy by using heat capacity at conatant volume, Cy 2.
Ten. moles of ideal gas (monatomic), in the initial state P1=10atm, T1=300K are taken round the following cycle: a. A reversible isothermal expansion to V=246 liters, and b. A reversible adiabatic process to P=10 atm c. A reversible isobaric compression to V=24.6 liters Calculate the change of work (w), heat (q), internal energy (U), and entropy (S) of the system for each process?
TB4 The quasi-static ideal gas cycle shown to the right has three legs, an adiabatic leg #1 from (PyVị) to (P-1 atm, V3), followed by an isobaric compression leg #2 from (P-1 atm, V3) to (P -1 atm,Vi), and ending with a constant volume pressurization leg #3 from (P-1 atm, VI) back to the initial state to complete the cycle. There are n moles of gas. What happens to the internal energy ( Ein) during leg #2 of this process?...
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
5. He (ideal gas, 1 mol) is sealed in a adiabatic gas cylinder. The initial stae is 20 L, 200 kPa. At one moment, external pressure (equal to pressure of system) decreases to final pressure. The final volume is 30 L. Calculate the change in entropy in this process. (2 points)
Which of the following statements does not apply to the definition of an ideal gas? Group of answer choices a. Intermolecular interactions are negligible. b. The Gibbs free energy only depends upon the temperature. c. The enthalpy only depends upon the temperature. d. The internal energy only depends upon the temperature. e. None. The previous answers are all correct. Consider a solid substance. Which of the following expressions is wrong? Group of answer choices a. Internal energy increases when the...
Helium gas at 105.0 kPa and 309.0K is located within a cylinder with a piston. Initially the gas occupies 0.4000 m. While a constant force, F, is applied to the end of the piston so that the pressure inside the cylinder is held constant at 105.0 kPa, 5090.0 J of heat is transferred to the helium gas. The specific enthalpy of helium gas is given by the approximate relation: (kJ/mol) = 0.02087(K) Q=5090.0J Final Conditions P2 = 105.0 kPa Initial...
Twenty moles of a monatomic ideal gas (? = 5/3) undergo an adiabatic process. The initial pressure is 400 kPa and the initial temperature is 450 K. The final temperature of the gas is 320 K. In the situation above, the change in the internal energy of the gas, in kJ, is closest to:
Assume there's 1 mol ideal mono-atomic gas in a 22.4L container
at 300K. The initial entropy of the system is 100J/K. For the
following processes, calculate:
a) q and w for a reversible expansion to twice the volume,
isothermally.
b)
S and
G for irreversible isothermal expansion against a constant 0.5 bar
external pressure, to a final internal pressure of 0.5 bar.
c)
U and
H for adiabatic reversible expansion to twice the volume.
Helium gas at 113.0 kPa and 426.0 K is located within a cylinder with a piston. Initially the gas occupies 0.3400 m. While a constant force, F, is applied to the end of the piston so that the pressure inside the cylinder is held constant at 113.0 kPa, 7060.0 J of heat is transferred to the helium gas. The specific enthalpy of helium gas is given by the approximate relation: HkJ/mol) = 0.02087(K) Q=7060.0J > F- Final Conditions P2 =...