GATE ME
Thermodynamics
Properties of Pure Substances
Previous Years Questions

## Marks 1

The INCORRECT statement about the characteristics of critical point of a pure substance is that
A rigid container of volume $$0.5$$ $${m^3}$$ contains $$1.0$$ $$kg$$ of water at $${120^ \circ }C$$ $$\left( {{V_f} = 0.00106\,{m^3}/kg,\,\,{v_g} = ... For an ideal gas with constant values of specific heats, for calculation of the specific enthalpy, A pure substance at$$8MPa$$and$${400^ \circ }C$$is having a specific internal energy of$$2864kJ/kg$$and a specific volume of$$0.03432...
Water has a critical specific volume of $$0.003155$$ $${m^3}/kg.$$ A closed and rigid steel tank of volume $$0.025{m^3}$$ contains a mixture of water ...
When wet steam flows through a throttle valve and remains wet at exit
Constant pressure lines in the super-heated region of the Mollier diagram will have
During the phase change of a pure substance:
The relationship $$\,{\left( {\partial T/{\partial _p}} \right)_h} = 0$$ holds good for :
At the point of a pure substance, the number of degrees of freedom is :

## Marks 2

Steam enters a turbine at $$30bar,$$ $${300^ \circ }C$$ $$\left( {u = 2750\,\,kJ/kg,\,\,h = 2993\,\,kJ/kg} \right)$$ and exits the turbine as saturate...
In the figure shown, the system is a pure substance kept in a piston- cylinder arrangement. The system is initially a two- phase mixture containing $$... In the figure shown, the system is a pure substance kept in a piston- cylinder arrangement. The system is initially a two- phase mixture containing$$...
In the figure shown, the system is a pure substance kept in a piston- cylinder arrangement. The system is initially a two- phase mixture containing $$... Given below is an extract from steam tables. Specific enthalpy of water in$$kJ/kg$$at$$150$$bar and$$ {45^ \circ }C$$is ... The following table of properties was printed out for saturated liquid and saturated vapour of ammonia. The titles for only the first two columns are ... The following table of properties was printed out for saturated liquid and saturated vapour of ammonia. The titles for only the first two columns are ... In the vicinity of the triple point, the vapour pressures of liquid and solid ammonia are respectively given by$$\eqalign{ & \ln \,\,P = 15.16...
A vessel of volume $$\,\,1.0\,\,{m^3}$$ contains a mixture of liquid water and steam in equilibrium at $$1.0$$ bar.Given that $$90\%$$ of the volume ...
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