GATE ME 2016 Set 2 — Question 54
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Thermodynamics → Laws & Properties → Ideal & Real Gas Behaviour
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Question
A piston-cylinder device initially contains 0.4 m of air (to be treated as an ideal gas) at 100 kPa and 80 C. The air is now isothermally compressed to 0.1 m. The work done during this process is ________ kJ.(Take the sign convention such that work done on the system is negative)
Correct answer
-55.6 to -55.4
Solution
For an isothermal process of an ideal gas, the work done is given by:
Given:
kPa
m
m
kJ.
According to the sign convention provided (work done on the system is negative), the answer is -55.45 kJ.
Given:
kPa
m
m
kJ.
According to the sign convention provided (work done on the system is negative), the answer is -55.45 kJ.
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