A group of 75 persons attend a secret meeting in a room which is 12 meters wide by 10 meters long and a ceiling height of 3 m. The room is completely sealed off and insulated. Each person gives off 2000 calories per minute of heat and occupies a volume of 0.2 m3. The room has an initial pressure of 14.5 psia and temperature of 16°C. Calculate the room temperature after 10 minutes.

Q: The interior contents and materials of a small building weigh 10 tons, and together they have an…

A:

Q: The energy required to raise the temperature of 5-kg of Oxygen from 300 K to 301 K in a rigid tank…

A: Given,            Mass of the Oxygen (M) = 5 kg          Temperature difference (∆T) =301K - 300K =…

Q: mass of the copper?

A: GIVEN- Heat (q) = 1386J T1= 20 deg.c T2= 80 deg.c Copper heat capacity (C) = 0.385 J/g ° C   To…

Q: During an experimental test, gas in a cylinder undergoes an expansion and moves a piston. Pressure…

A: The gas in the cylinder expands and this expansion results in movement of the piston. The work is…

Q: 50 persons attended a secret meeting in a room 12 meters long, 10 meters wide and a ceiling height…

A: Given Data N=50 L=12 m W=10 m H=3 m Ti=16°C q=150 kcal/hr per person t=15 min

Q: based on Professor Plum finding Mr. Body dead at 7 PM in the Dining Room of the Parker Brother…

A: GivenT=25°CT'=37°CT"=20°Cρ=996 kg/m3c=4.178 kJ/kg°C=4178 J/kg°CD=30cm=0.3mL=1.7mNow the surface area…

Q: PMM2 is the machine that violates only Clausius's statement of the second law of thermodynamics.…

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Q: Max likes to drink tea. He uses his kettle to heat 1.6 liters of water from 18°C to 100°C every day.…

A: Heat transfer: the transfer of heat from one body to another body due to the temperature differences…

Q: On a mild Saturday morning while people are working inside, the furnace keeps the temperature inside…

A: GivenTi=23oCTo=14oCT=19oCτ=3 hrwhen windows are opnedτ=2hr

Q: . A group of 150 persons are inside a room 30 m x 20 m x 4 m which is completely sealed off and…

A: Given: V' = 0.25 cubic meter Volume of room = 30 m × 20 m × 4 m E' = 150 kCal/hr

Q: Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

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Q: In the refrigeration experiment you obtained the following values while using the fixed orifice…

A: As per given question we have determine  What is the value of the compressor work per unit mass in…

Q: 200 J of energy is transferred to a system consisting of 2.0 moles of an ideal gas. If the volume of…

A: GIVEN: 200 J of energy is added; 2.0 moles of idea gas; The volume is 2.6 L and remains constant, TO…

Q: =) The piston of a cylinder-piston device has a mass of 72 kg and a cro cross- sectional area of…

A:

Q: A metal container, which has a mass of 8.6 kg contains 17.3 kg of water. A 3.1-kg piece of the san…

A: To find specific heat of metal

Q: 19. Calculate the density of a gas at 188psia and 82°F when its specific volume is 2ft³/lb at…

A: Given Datat State 1: 14.7 psia, 2 ft3/lb, 32°F State 2: 188 psia, 82°F

Q: ms is suspended from a spring, and the spring stretches 12.1 centimeters. The mass is then removed,…

A: Given data as per question m=0.43 kg x=12.1 cm=0.121 m Work done =0.380 J

Q: store ice is made of wood 5.0 cm thick and has an effective area of 12,000 cm2 and thermal…

A: given x=5cm A=12000cm2 K=0.00027 cal/cm2-sec-°C/cm time t=24 hour  T out=25 oC T in=5 oC

Q: The instruction booklet for your pressure cooker indicates that its highest setting is 11.3 psipsi .…

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Q: witness an industrial fire in which an unknown liquid spilled in to a 8.2 feet diameter circular…

A: Given:m=3180 Kgt=30 minQ=50.5 MW

Q: s to warm up from 10 C to 20 C in a room whose temperature is 30 C. Assuming Newton's law of…

A: Given:t1=15 min =15*60t1=900 secTb=10°CT1=20°CT∞=30°CT2=25°C

Q: b. The ceiling of a certain room in a student's dormitory has an area of 200 ft’. It contains…

A: Heat is a form of energy which transfers from high temperature reservoir to the low temperature…

Q: A mass of 3.3 Kg of Nitrogen in a piston-cylinder device is heated from 25 to 90 °C by passing…

A:

Q: A 1.76-m³ rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the…

A: V=1.76 m3 T=220oc Vf=13V Vg=23V To find: the quality of the mixture,x.

Q: A student struggled with his first midterm exam and is slightly angry. For this reason he drops a 10…

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Q: Real gases obeys gas laws under certain conditions of temperature and pressure. Select one: True O…

A: Real gases behavior as ideal gases.

Q: A dormitory room measures 4m x 6m x 6m. A student turns on a 150 watts fan before leaving the room…

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Q: QUESTION 16 THERMODYNAMICS A mass of 5 kg of saturated water vapour at 300 kPa is heated at constant…

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Q: 8. A thermometer reading 18°F is brought into a room where the temperature is 70°F; 1 min later the…

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Q: A thermometer reads 90C initially and is placed in a room of temperature 21C. After 2 minutes, the…

A: Given Data: Initial temperature, T1=120 C Room temperature, Ta= 21 C

Q: How much more time(minutes) needs to pass to reach 47°C.

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Q: Compute the mass of a 2m3 oxygen at 280 kPa and 40°C

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.