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RVUNL ME || Thermodynamics || Quiz 4
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Question 1
Find the increase in unavailable energy associated with transfer of 800kJ of heat from a constant temperature system at 600K to another constant temperature at 400K. The ambient temperature is 300K.
Question 2
A cyclic device operates between three thermal reservoirs, as shown in the figure. Interactions between the cyclic device and the respective thermal reservoirs are shown in the figure and all are in the form of heat transfer. The cyclic device can be _____.
Question 3
According to second law of thermodynamics, the entropy change of the system for any process can be
Question 4
Air is flowing steadily through a thermally insulated duct. The pressure and temperature of the air measured at two different stations are as follows:
Considering air as an ideal gas, the direction of flow of air in the duct is ____.
Considering air as an ideal gas, the direction of flow of air in the duct is ____.
Question 5
A reversible heat engine receives 2 kJ of heat from a reservoir at 1000 K and a certain amount of heat from a reservoir at 800 K. It rejects 1 kJ of heat to a reservoir at 400 K. The net work output (in kJ) of the cycle is
Question 6
A heat reservoir is maintained at 627oC. If the ambient temperature is 27oC, the availability of heat from the reservoir is limited to ________.
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