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## Marks 1

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Which one of the following pairs of equations describes an irreversible heat engine?
GATE ME 2014 Set 3
One kilogram of water at room temperature is brought into contact with a high temperature thermal reservoir. The entropy...
GATE ME 2010
If a closed system is undergoing an irreversible process, the entropy of the system
GATE ME 2009
$$2$$ moles of oxygen are mixed adiabatically with another $$2$$ moles of oxygen in mixing chamber, so that the final to...
GATE ME 2008
Which of the following relationships is valid only for reversible process undergone by a closed system of simple compres...
GATE ME 2007
A system undergoes a state change from $$1$$ to $$2.$$ According to the second law of thermodynamics, for the process to...
GATE ME 1997
For an ideal gas the expression $$\left[ {T{{\left( {{{\delta s} \over {\delta T}}} \right)}_p} - T{{\left( {{{\delta s}... GATE ME 1997 The slopes of constant volume and constant pressure lines in the$$T$$-$$s$$diagram are ___________ and ___________resp... GATE ME 1994 A$$1500W$$electrical heater is used to heat$$20kg$$of water$$\left( {{C_p} = 4186\,\,J/kg\,\,K} \right)$$... GATE ME 1994 Which among the following relations is/are valid ONLY for reversible process undergone by a pure substance? GATE ME 1993 When a system executes an irreversible cycle: GATE ME 1993 ## Marks 2 More One$$kg$$of an ideal gas (gas constant$$R=287J/kg$$-$$K$$) undergoes an irreversible process from state-$${\rm ...
GATE ME 2017 Set 2
One kg of air ($${R = 287\,\,J/kg}$$-$$K$$) under goes irreversible process between equilibrium state $$1\,\,\left( {{{2... GATE ME 2015 Set 2 Two identical metal blocks$$L$$and$$M$$(specific heat$$=0.4kJ/kg.K$$), each having a mass of$$5kg,$$are... GATE ME 2014 Set 4 A closed system contains$$10kg$$of saturated liquid ammonia at$${10^ \circ }C.$$Heat addition required to conve... GATE ME 2014 Set 4 An amount of$$100kW$$of heat is transferred through a wall in steady state. One side of the wall is maintained at... GATE ME 2014 Set 3 An ideal gas of mass$$m$$and temperature$${T_1}$$undergoes a reversible isothermal process from an initial pressure ... GATE ME 2012 In an experimental set-up, air flows between two stations$$P$$and$$Q$$adiabatically. The direction of flow depends o... GATE ME 2011 In an experimental set-up, air flows between two stations$$P$$and$$Q$$adiabatically. The direction of flow depends o... GATE ME 2011 Consider the following two processes;$$\left( {\rm I} \right)$$A heat source at$$1200K$$loses$$2500kJ$$... GATE ME 2010 A cycle device operates between three thermal reservoirs, as shown in the figure. Heat is transferred to/from the cyclic... GATE ME 2008 A vapor absorption refrigeration system is a heat pump with three thermal reservoirs as shown in the figure. A refrigera... GATE ME 2005 Nitrogen gas (molecular weight$$28$$) is enclosed in a cylinder by a piston, at the initial condition of$$2$$bar,$$2...
GATE ME 2003
Nitrogen gas (molecular weight $$28$$) is enclosed in a cylinder by a piston, at the initial condition of $$2$$ bar, $$2... GATE ME 2003 Considering the relationship$$TdS=dU+PdV$$between the entropy$$(S),$$internal energy$$(U),$$pressure$$(P),$$tempe... GATE ME 2003 One kilomole of an ideal gas is throttled from an initial pressure of$$0.5MPa$$to$$0.1MPa.$$The initial te... GATE ME 1995 Figure below shows a reversible heat engine$${E_R}$$having heat interactions with three constant temperature systems. ... GATE ME 1993 ## Marks 5 More An iron cube at a temperature of$$400$$deg$$C$$is dropped into an insulated bath containing$$10kg water at \$...
GATE ME 1996

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