A closed vessel contains pure water, in thermal equilibrium with its vapour at 25°C (Stage#1), as shown. The vessel in this stage is then kept inside an isothermal oven which is having an atmosphere of hot air maintained at 80^{\circ} {C}. The vessel exchanges heat with the oven atmosphere and attains a new thermal equilibrium (Stage #2). If the Valve A is now opened inside the oven, what will happen immediately after opening the valve?

Correct Answer is : Hot air will go inside the vessel through Valve A

Hot air will go inside the vessel through Valve A

Water vapour inside the vessel will come out of the Valve A

All the vapour inside the vessel will immediately condense

Nothing will happen - the vessel will continue to remain in equilibrium

GATE Mechanical Engineering (ME) 2020 Shift 2 Solved Paper

Question : 18 of 65

Marks: +1, -0

A closed vessel contains pure water, in thermal equilibrium with its vapour at 25°C (Stage#1), as shown.

The vessel in this stage is then kept inside an isothermal oven which is having an atmosphere of hot air maintained at

80^{∘} {C}

. The vessel exchanges heat with the oven atmosphere and attains a new thermal equilibrium (Stage #2). If the Valve

A

is now opened inside the oven, what will happen immediately after opening the valve?

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