Figure 2 D 2.0 10.0 Volume /L (a) Figure 2 showed an ideal gas is slowly compressed at a constant pressure of 2.0 atm from 10L to 2.0 L (Heat flows out and the temperature drops). Heat is then added to the gas holding the volume constant, pressure and temperature are allowed to rise until the temperature reaches its original value. Calculate the (1) total heat flow out when the temperature reaches its original value Pressure /atm

Figure 2 D 2.0 10.0 Volume /L (a) Figure 2 showed an ideal gas is slowly compressed at a constant pressure of 2.0 atm from 10L to 2.0 L (Heat flows out and the temperature drops). Heat is then added to the gas holding the volume constant, pressure and temperature are allowed to rise until the temperature reaches its original value. Calculate the (1) total heat flow out when the temperature reaches its original value Pressure /atm

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 95P: (a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a I...

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In a production facility, 1.2-in-thick, 2-ft *2-ft square brass plates (r = 532.5 lbm/ft3 and cp =0.091 Btu/lbmF) that are initially at a uniform temperatureof 75F are heated by passing them through an ovenat 1300F at a rate of 450 per minute. If the plates remain in the oven until their average temperature rises to 1000F,determine (a) the rate of heat transfer to the plates in thefurnace and (b) the rate of entropy generation associatedwith this heat transfer process.
For a temperature difference ΔT = 20C, one slab of material conducts 10W/m². What is the rate of heat flow per m² of surface area when the slabs are placed side by side with ΔTtot = 20C?
What quantity of energy does it take to convert 0.500 kg ice at –20.°C to steam at 250.°C? Specific heat capacities: ice, 2.03 J/g • °C; liquid, 4.2 J/g . °C; steam, 2.0 J/g • °C; ∆Hvap = 40.7 kJ/mol; ∆Hfus = 6.02 kJ/mol.
One winter day, the climate control system of a large university classroom building malfunctions. As a result, 500m3 of excess cold air is brought in each minute. At what rate in kilowatts must heat transfer occur to warm this air by 10.0ºC (that is, to bring the air to room temperature)?
One process for decaffeinating coffee uses carbon dioxide ( M=44.0 g/mol) at a molar density of about 14,0 mol/m3 and a temperature of about 60 . (a) Is CO2 a solid, liquid, gas, or supercritical fluid under those conditions? (b) The van der Waals constants for carbon dioxide are a=0.3658 Pa m6/mol2 and b=4.286105 m3/mol. Using the van der Waals equation, estimate pressure of CO2 at that temperature and density. `
Most automobiles have a coolant reservoir to catch radiator fluid than may overflow when 1he engine is hot. A radiator is made of copper and is filled to its 16.0L capacity when at 10.0C. What volume of radiator fluid will overflow when the radiator and fluid reach their 95.0C operating temperature, given that the fluid’s volume coefficient of expansion is =400106/C ? Note that this coefficient is approximate, because most car radiators have operating temperatures of greater than 95.0C.
(a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a I .40-m surface area? Assume that the animal's skin temperature is 32.0 , that the air temperature is 5.00 , and that has the same thermal conductivity as air. (b) What food intake will the animal need in one day to replace this heat transfer?
A mercury thermometer still in use for meteorology has a bulb with a volume of 0.780 cm3 and a tube for the mercury to expand into of inside diameter 0.130 mm. (a) Neglecting the thermal expansion of the glass, what is the spacing between marks 1 apart? (b) If the thermometer is made of ordinary glass (not a good idea), what is the spacing?
One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose a single-story cubical house already had 15 cm of fiberglass insulation in the attic and in all the exterior surfaces. If you added an extra 8.0 cm of fiberglass to the attic, by what percentage would the heating cost of the house drop? Take the house to have dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors, and assume that the interior is uniformly at one temperature and the exterior is uniformly at another.
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