Question

How much work is lost in a reversible process? Explain.

Answer #1

True or False?
a. A gas process that is not reversible can be drawn on a PV
diagram
b. The work done by the gas is given by the integral of PdV for
any reversible process.
c. The heat added to a system does not depend on the path taken
or whether the process is reversible or not.
d. The internal energy of a system is only affected by heat and
work.
e. In an isothermal process for an ideal...

Describe how a reversible and irreversible process different at the
molecular level?
What is the difference, on a molecular level, between and
isothermal and an adiabatic process?
Using the maxwell construction, explain how the vapor pressure
is chosen?

Give an example of
(a) a reversible isochoric process;
(b) a quasistatic, adiabatic, isobaric process;
(c) an irreversible isothermal process.
Be careful to specify the system in each case.

Explain how the 5s techniques contributes and facilitates
standardized work (SOP) and process flow in a lean production
system. Furthermore, you should discuss how this integration (of 5s
and standardized work) contributes to decreasing costs by
increasing efficiency through the elimination/reduction of waste in
lean production systems and how it create stability in lean
production systems. (10 points)

True or false: The inequality, ΔS > ΔH/T, holds for
reversible process at constant pressure.

1) Please explain what the difference b/t reversible and
irreversible inhibition mechanism?
Also provide 2 examples from each category.
2) Bring a couple of examples for covalent inhibitors
and describe how they work.

In a cylinder/piston arrangement, air is compressed in a
reversible polytropic process to a final state of 800 kPa, 500 K.
Initially air is at 110 kPa and 25oC. During the
compression process heat transfer takes place with the ambient
maintained at 25oC. Assume air as an ideal gas (R =0.287
kJ/kg) and has constant specific heats of Cp = 1.004
kJ/kgK and Cv = 0.717 kJ/kgK. If the mass of air in the
cylinder is 0.1286 kg, determine
a)...

Nitrogen (N2) undergoes an internally reversible process from 6
bar, 247°C during which pν1.1 = constant. The initial volume is 0.1
m3 and the work for the process is 50 kJ. Assuming ideal gas
behavior, and neglecting kinetic and potential energy effects,
determine heat transfer, in kJ, and the entropy change, in kJ/K. Q
= kJ ΔS = kJ/K

In a reversible process the rate of heat transfer to the system
by increase unit temperature is given by dQ / dT = 0.5kJ / ° C.
Find the change in entropy of the system if its temperature
increases from 500 to 800 K.

Derive an expression for reversible work performed on/by a
Redlich-Kwong gas. Use your expression to calculate and compare
wrev for reversible compression of carbon dioxide and
methane gases from 10.0 L to 1.0 L at 25oC. Which gas
requires more energy to be compressed? What molecular property
contributes most to the difference in work required?

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