Recent questions in TD

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Constant pressure lines in the superheated region of the Mollier diagram will have

asked Aug 29, 2017 in TD by chandu (215k points)

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At the triple point of a pure substance, the number of degrees of freedom is:

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During the phase change of a pure substance:

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The relationship $\left ( \frac{\delta T}{\delta P} \right )_{h}=0$ holds good for

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Find the entropy changes for the iron cube and the water. Is the process irreversible? If so, why?

asked Aug 29, 2017 in TD by chandu (215k points)

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An ideal gas of mass m is contained in a rigid tank of volume V at a pressure P.

asked Aug 29, 2017 in TD by chandu (215k points)

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One kg of air under goes irreversible process between equilibrium state 1 and equilibrium state 2.

asked Aug 29, 2017 in TD by chandu (215k points)

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Two identical metal blocks L and M (specific heat = 0.4 kJ/kg.K), each having a mass of 5 kg, are initially at 313 K

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If the entropy of the saturated liquid is 0.88 kJ/kg.K, the entropy (in kJ/kg.K) of saturated vapour is ___

asked Aug 29, 2017 in TD by chandu (215k points)

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The entropy generated (in W/K) due to the heat transfer through the wall is ___________

asked Aug 29, 2017 in TD by chandu (215k points)

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The heat loss during the process is Q. The entropy change DS of the gas is

asked Aug 29, 2017 in TD by chandu (215k points)

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If the air has to flow from station P to station Q, the maximum possible value of pressure in kPa at station Q is

asked Aug 29, 2017 in TD by chandu (215k points)

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Consider the following two processes

asked Aug 29, 2017 in TD by chandu (215k points)

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A cyclic device operates between three thermal reservoirs, as shown in the figure.

asked Aug 29, 2017 in TD by chandu (215k points)

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A vapour absorption refrigeration system is a heat pump with three thermal reservoirs s shown in the figure.

asked Aug 29, 2017 in TD by chandu (215k points)

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The entropy change for the system during the process in kJ/K is

asked Aug 29, 2017 in TD by chandu (215k points)

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Considering the relationship TdS = dU + PdV

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The entropy change of the universe is

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Calculate the thermal efficiency of the heat engine

asked Aug 29, 2017 in TD by chandu (215k points)

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Which one of the following pairs of equations describes an irreversible heat engine?

asked Aug 29, 2017 in TD by chandu (215k points)

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