A piston-cylinder device contains air at 100 [kPa], 25 °C and 0.2 [m³]. The air then undergoes an isobaric,
polytropic expansion to a volume of 0.4 [m³]. Assume the air can be treated as an ideal gas. Please
answer the following:
2.a)
Homework Answered Due Today, 11:59 PM
What is the mass of air contained in the piston-cylinder? Units are taken as [kg]. Report your answer to three decimal places. There
is a 1% tolerance applied to the answer.
Type your numeric answer and submit
Hint
If the air is assumed to act as an ideal gas, what formula can we use?
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2.b)
Homework Answered Due Today, 11:59 PM
What is the final temperature after expansion? Units are taken as [K]. Report your answer to one decimal place. There is a 1%
tolerance applied to the answer.
Type your numeric answer and submit
Hint
if the process is isobaric (i.e., constant pressure), do we have enough information to solve for the final temperature assuming the air is
an ideal gas?
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2.c)
Homework Unanswered Due Today, 11:59 PM
How much work is done by the gas during this expansion? Units are taken as [kJ]. Report your answer to the nearest whole
number. There is a 1% tolerance applied to this answer, however, it should not be needed.
