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GATE ME 2022: Thermodynamics (App update required to attempt this test)

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Question 1

A house that is losing heat at a rate of 60,000 kJ/hr when the outside temperature drops to 4 °C, is to be heated by electric resistance heaters. If the house is to be maintained at 24 °C at all times, then the irreversibility (in kW) of this process is

Question 2

 50 kg of water at 85 oC mixes with 70 kg of water at 45 oC at a constant pressure. The  decrease in available energy (in KJ) is ___ (cp of water is 4.2 kJ/kgK and temperature of surroundings is 25oC)

Question 3

Using the Clausius–Clapeyron equation find the enthalpy of vaporization (in kJ/kg).

The following data is given:
At 2500C, vg = 0.1574 m3/kg
vf = 0.001869 m3/kg
dP/dT= 55 kPa/K

Question 4

A vessel of volume of 0.05 m3 contains a mixture of saturated steam and saturated water at a temperature of 250. The mass of liquid is 10 kg. The specific enthalpy (kJ/kg) of mixture is-

Use the following table:

Question 5

A Carnot engine operates between temperature limits of while producing 130 kJ of work. The entropy change during the heat rejection process in kJ/K is _______

Question 6

What will be the temperature the source of a Carnot heat engine, if it has a sink at triple point of water. The amount of heat absorbed and rejected are 2.45 kJ/s and 1.55 kJ/s.
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Jun 13ESE & GATE ME