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estimate the specific heat transfer from the area in a t-s diagram and compare it to the correct value for the states
1 a closed tank v 10 l containing 5 kg of water initially at 25c is heated to 150c by a heat pump that is receiving
a rigid insulated vessel contains superheated vapor steam at 3 mpa 400c a valve on the vessel is opened allowing steam
1 water at 100 kpa 25c is brought to the boiling point in a pistoncylinder with an isobaric process the heat is
1 a large slab of concrete 5 times 8 times 03 m is used as a thermal storage mass in a solar-heated house if the slab
a 10-kg steel container is cured at 500c liquid water at 15c 100 kpa is added to the container so the final uniform
1 a pan in an auto shop contains 5 l of engine oil at 20c 100 kpa now 3 l of oil at 100c is mixed into the pan neglect
1 a pistoncylinder compressor takes r-410a as saturated vapor 500 kpa and compresses it in a reversible adiabatic
a pistoncylinder shown in figp692 contains air at 1380 k 15 mpa with v1 10 cm3 acyl 5 cm2 the piston is released and
an insulated pistoncylinder setup contains carbon dioxide gas at 800 kpa 300 k that is then compressed to 6 mpa in a
a handheld pump for a bicycle fig p691 has a volume of 25 cm3 when fully extended you now press the plunger piston in
1 argon in a light bulb is at 90 kpa 20c when it is turned on and electricity input now heats it to 60c find the
1 air in a rigid tank is at 900 k 500 kpa and it now cools to the ambient temperature of 300 k by heat loss to the
a pistoncylinder system contains 50 l air at 300c 100 kpa with the piston initially on a set of stops a total external
a constant pressure pistoncylinder contains 05 kg air at 300 k 400 kpa assume the pistoncylinder has a total mass of 1
1 a cylinderpiston contains 100 l air at 110 kpa 25c the air is compressed in a reversible polytropic process to a
a heat pump see problem 549 should upgrade 5 mw of heat at 85c to heat delivered at 150c for a reversible heat pump
1 a heat pump with cop 4 uses 1 kw of power input to heat a 25c room drawing energy from the outside at 15c assume the
a car engine block receives 2 kw at its surface of 450 k from hot combustion gases at 1500 k near the cooling channel
assume the heat source in problem 3217 is at 300c in a setup similar to fig p6182 find the heat transfer and the
a pistoncylinder has a water volume separated in va 02 m3 and vb 03 m3 by a stiff membrane similar to the one in fig
two tanks contain steam and they are both connected to a pistoncylinder as shown in fig p6182 initially the piston is
1 water at 20 psia 240 f receives 40 btulbm in a reversible process by heat transfer which process changes s the most
consider the steam power plant in problem 5133e and show that this cycle satisfies the inequality of clausiusproblem