GATE XE · 2022 · XE-E
Question 103: First Law of Thermodynamics
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Question 103
XE-ENAT2 marksNeeds review
An insulated rigid tank of volume 10 m³ contains air initially at 1 MPa and 600 K. A valve connected to the tank is opened, and air is allowed to escape until the temperature inside the tank drops to 400 K. The temperature of the discharged air can be approximated as the average of the initial and final temperatures of the air in the tank. Neglect kinetic and potential energies of the discharged air. Assume that air behaves as an ideal gas with constant specific heat so that internal energy
and enthalpy
. Then, the final pressure of the air in the tank is ______ MPa (round off to 2 decimal places).Assume
kJ/(kg K),
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2022XE-E
GATE XE 2022 · Paper 1
Engineering Sciences · Original paper archive
- Section
- Section XE-E
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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