QUESTION 44 The following processes occurs in a reversible thermodynamic cycle: 1-2: Reversible polytropic compression at pressure 0.5 bar at volume 0.08 m to a pressure 11 bar and specific volume 0.4 m/kg. The index of compression may be taken as n. 2-3: Reversibly expansion with expansion index of 2 to pressure 2.9 bar. 3-1: Reversible cooling at constant volume to the initial state. Calculate the work for the expansion in the process to 2 decimal places. Not in kilo or mega of unit.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Question
estion Completion StatuS:
(a)
(b)
(c)
(d)
O a. (d) O b.(a) Oc(c) Od.(b)
QUESTION 44
The following processes occurs in a reversible thermodynamic cycle:
1-2: Reversible polytropic compression at pressure 0.5 bar at volume 0.08 m to a pressure 11 bar and specific
volume 0.4 m/kg. The index of compression may be taken as n.
2-3: Reversibly expansion with expansion index of 2 to pressure 2.9 bar.
3-1: Reversible cooling at constant volume to the initial state.
Calculate the work for the expansion in the process to 2 decimal places.
Not in kilo or mega of unit.
QUESTION 45
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Transcribed Image Text:estion Completion StatuS: (a) (b) (c) (d) O a. (d) O b.(a) Oc(c) Od.(b) QUESTION 44 The following processes occurs in a reversible thermodynamic cycle: 1-2: Reversible polytropic compression at pressure 0.5 bar at volume 0.08 m to a pressure 11 bar and specific volume 0.4 m/kg. The index of compression may be taken as n. 2-3: Reversibly expansion with expansion index of 2 to pressure 2.9 bar. 3-1: Reversible cooling at constant volume to the initial state. Calculate the work for the expansion in the process to 2 decimal places. Not in kilo or mega of unit. QUESTION 45 Click Save and Submit to save and submit. Click Save All Answers to save all anszers. Save All Answers P Type here to search 曲
Question Completion Status:
QUESTION 45
Which or the following is the correct statement?
Irreversible
Og.
engines
have
maximum
efficiency
O e. All engines f.All the
O c. The entropy
represents a
maximum
amount of
work
obtainable per
degree drop in
temperature
O d. The change in
entropy may be
regarded as a
measure of the
rate of the
availability of
heat for
transformation
into work
a.All the
reversible
O b. The increase
in entropy is
obtained from
reversible
and
irreversible
are
designed
engines
have the
as
a given
quantity of
heat at a low
engines
have the
reversible
in order to
obtain
maximum
efficiency
same
efficiency
same
temperature
efficiency
QUESTION 46
Carbon dioxide (molar mass 44 kg/kmol) expands reversibly in a perfectly thermally insulated cylinder from 3.7 bar,
220 °C to a volume of 0.085 m3. If the initial volume occupied was 0.02 m, calculate the gas constant to 3 decimal
places. Assume nitrogen to be a perfect gas and take cv = 0.63 k J/kg K.
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acer
Transcribed Image Text:Question Completion Status: QUESTION 45 Which or the following is the correct statement? Irreversible Og. engines have maximum efficiency O e. All engines f.All the O c. The entropy represents a maximum amount of work obtainable per degree drop in temperature O d. The change in entropy may be regarded as a measure of the rate of the availability of heat for transformation into work a.All the reversible O b. The increase in entropy is obtained from reversible and irreversible are designed engines have the as a given quantity of heat at a low engines have the reversible in order to obtain maximum efficiency same efficiency same temperature efficiency QUESTION 46 Carbon dioxide (molar mass 44 kg/kmol) expands reversibly in a perfectly thermally insulated cylinder from 3.7 bar, 220 °C to a volume of 0.085 m3. If the initial volume occupied was 0.02 m, calculate the gas constant to 3 decimal places. Assume nitrogen to be a perfect gas and take cv = 0.63 k J/kg K. Click Save and Submit to save and submit. Click Save All Answers to save all ansuers. Save All Answers O Type here to search acer
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