EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
9th Edition
ISBN: 9781119321453
Author: Sonntag
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Chapter 3, Problem 3.51P
To determine
Value of the total heat transfer loss.
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Question
A 2-m2 window has a surface temperature of 15° C,
and the outside wind is blowing air at 2° C across it
with a convection heat transfer coefficient of h = 125
W/m2 K. What is the total heat transfer loss?
A person stands in a breezy room whose temperature is 20 °C. The emissivity of
the person is 0.35. Determine the total rate of heat transfer from this person if the
exposed surface area and the average surface temperature of the person are 1.6
m2 and 29 °C respectively. Take the convection heat transfer coefficient to be 6.5
W/m2/K and that the surrounding wall of the room is at a temperature of 20 oC.
Select one:
A 123.7 W
B. 86.4 W
C. 151.7 W
D. 100.5 W
E 43.0 W
Determine the heat transfer by convection over a surface of 0.75m2 if the surface is at 2000C and the fluid is at 800C. The value of convective heat transfer is 25 W/m2 0C.
Chapter 3 Solutions
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
Ch. 3 - What is 1cal in SI units and what is the name...Ch. 3 - A car engine is rated at 110kW . What is the power...Ch. 3 - Why do we write E or E2E1 , whereas we write 1Q2...Ch. 3 - If a process in a control mass increases energy...Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - A thermopane window traps some gas between the two...Ch. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - The electric bill is calculating usage in kWh....Ch. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - You heat a gas 10K at P=C . Which one in Table A.5...Ch. 3 - You mix 20C water with 50C water in an open...Ch. 3 - A piston motion moves a 25kg hammerhead vertically...Ch. 3 - A pump pushes 1000m3 of liquid water at 15C up to...Ch. 3 - Prob. 3.26PCh. 3 - A 1200kg car accelerates from zero to 100km/h over...Ch. 3 - A hydraulic hoist raises a 1750kg car 1.8m in an...Ch. 3 - Prob. 3.29PCh. 3 - A hydraulic cylinder of area 0.01m2 must push a...Ch. 3 - A hydraulic cylinder has a piston cross-sectional...Ch. 3 - Prob. 3.32PCh. 3 - A bulldozer pushes 800kg of din l00m with a force...Ch. 3 - Two hydraulic cylinders maintain a pressure of...Ch. 3 - A motor delivers 50hp on a drive shaft at 1800rpm...Ch. 3 - Prob. 3.36PCh. 3 - Prob. 3.37PCh. 3 - Prob. 3.38PCh. 3 - Prob. 3.39PCh. 3 - Prob. 3.40PCh. 3 - Heat transfer to a 1.5kg block of ice at -10C...Ch. 3 - A cylinder fitted with a frictionless piston...Ch. 3 - A piston cylinder contains 2kg of water at 20C...Ch. 3 - A nitrogen gas goes through a polytropic process...Ch. 3 - Helium gas expands from 125kPa,350K and 0.25m3 to...Ch. 3 - Prob. 3.46PCh. 3 - A balloon behaves so that the pressure is P=C2V1/3...Ch. 3 - A 15cm thick concrete wall, k=1.28W/mK , has a...Ch. 3 - The brake shoe and steel drum of a car...Ch. 3 - Prob. 3.50PCh. 3 - Prob. 3.51PCh. 3 - A power plant condenser (heat exchanger) transfers...Ch. 3 - Prob. 3.53PCh. 3 - A steel Pot, with conductivity of 15W/m and a 50mm...Ch. 3 - Prob. 3.55PCh. 3 - A wall surface on a house is 30C with an...Ch. 3 - A radiant heat lamp is a rod, tong and in diameter...Ch. 3 - A radiant beating lamp has a surface temperature...Ch. 3 - Determine the phase of the following substances...Ch. 3 - Find the phase and the missing properties of P, T,...Ch. 3 - Prob. 3.61PCh. 3 - Prob. 3.62PCh. 3 - Find the missing property of P, T, y, u, h, and x...Ch. 3 - Find the missing properties for carbon dioxide at...Ch. 3 - Find the missing property of P, T, y, u, h, and x...Ch. 3 - Saturated liquid water at 20C is compressed to a...Ch. 3 - Prob. 3.67PCh. 3 - Consider a steel bottle as a CV. It contains...Ch. 3 - A piston cylinder contains water with quality 75...Ch. 3 - Prob. 3.70PCh. 3 - Prob. 3.71PCh. 3 - Saturated vapor R410A at 0C in a rigid tank is...Ch. 3 - A constant-pressure piston/cylinder assembly...Ch. 3 - A container is split in two equal volumes by a...Ch. 3 - Prob. 3.75PCh. 3 - A cylinder fined with a frictionless piston...Ch. 3 - A piston/cylinder contains 1.5kg of water at...Ch. 3 - Prob. 3.78PCh. 3 - Ammonia (0.5kg) in a piston cy1tnde at 200kPa,10C...Ch. 3 - Prob. 3.80PCh. 3 - A rigid 1kg steel tank holds 0.75kg ammonia at 70C...Ch. 3 - Prob. 3.82PCh. 3 - Prob. 3.83PCh. 3 - Prob. 3.84PCh. 3 - Prob. 3.85PCh. 3 - A rigid steel tank contains 0.5kgR410A at 0°C with...Ch. 3 - Redo the previous problem when you also consider...Ch. 3 - Prob. 3.88PCh. 3 - Prob. 3.89PCh. 3 - Supetheated refrigerant R-134a at 20°C and 100 kPa...Ch. 3 - In a sink, 5 L of water at 70°C is combined with 1...Ch. 3 - Prob. 3.92PCh. 3 - Prob. 3.93PCh. 3 - Prob. 3.94PCh. 3 - A car with mass 1275 kg is driven at 60 km h when...Ch. 3 - A piston cylinder (0.5 kg steel altogether)...Ch. 3 - Prob. 3.97PCh. 3 - Prob. 3.98PCh. 3 - Use the ideal gas air A.7 to evaluate the specific...Ch. 3 - Prob. 3.100PCh. 3 - Find the change in u for carbon dioxide between...Ch. 3 - Nitrogen at 300 K. 3 MPa is heated to 500 K Find...Ch. 3 - Prob. 3.103PCh. 3 - Prob. 3.104PCh. 3 - Find the change in enthalpy for carbon dioxide...Ch. 3 - Water at 20°C and 100 kPa is brought to l00 kPa...Ch. 3 - Prob. 3.107PCh. 3 - A rigid container has 2 kg of oxygen gas at l00...Ch. 3 - Prob. 3.109PCh. 3 - Prob. 3.110PCh. 3 - Prob. 3.111PCh. 3 - A cylinder with a piston restrained by a linear...Ch. 3 - A constant pressure container is filled with 1 kg...Ch. 3 - A spring-loaded piston cylinder contains 1.5kg of...Ch. 3 - Prob. 3.115PCh. 3 - Prob. 3.116PCh. 3 - Helium gas expands from 125 kPa, 350 K and 0.25m3...Ch. 3 - A piston cylinder device contains 0.1 kg of air at...Ch. 3 - A gasoline engine has a piston/cylinder with 0.1...Ch. 3 - Solve the previous problem using Table A.7.Ch. 3 - Prob. 3.121PCh. 3 - Prob. 3.122PCh. 3 - A piston/cylinder assembly has 1 kg of propane gas...Ch. 3 - A piston cylinder arrangement of initial volume...Ch. 3 - Prob. 3.125PCh. 3 - Prob. 3.126PCh. 3 - Air goes through a polytropic process with n=1.3...Ch. 3 - Saturated vapor R410A at 10°C of mass 0.6 kg is in...Ch. 3 - A helium gas heated at constant volume from 100...Ch. 3 - Prob. 3.130PCh. 3 - Prob. 3.131PCh. 3 - Prob. 3.132PCh. 3 - Prob. 3.133PCh. 3 - Prob. 3.134PCh. 3 - Prob. 3.135PCh. 3 - Prob. 3.136PCh. 3 - Prob. 3.137PCh. 3 - Prob. 3.138PCh. 3 - Prob. 3.139PCh. 3 - Prob. 3.140PCh. 3 - Prob. 3.141PCh. 3 - Prob. 3.142PCh. 3 - Prob. 3.143PCh. 3 - As fresh-poured concrete hardens, the chemical...Ch. 3 - A 1.2-kg pot of water at 20°C is put on a stove...Ch. 3 - A computer in a closed room of volume 200m3...Ch. 3 - A 500-W heater is used to melt 2 kg of solid ice...Ch. 3 - A 3-kg mass of nitrogen gas at 2000 K, V=C , cools...Ch. 3 - Prob. 3.149PCh. 3 - Electric power as volts times amperes (P=Vi) ....Ch. 3 - A copper wire of diameter 2 mm is 10m long and...Ch. 3 - Prob. 3.152PCh. 3 - A battery is well insulated while being charged by...Ch. 3 - Prob. 3.154PCh. 3 - Assume a balloon material with a constant surface...Ch. 3 - A soap bubble has a surface tension of =3104N/cm...Ch. 3 - According to Table 3.4 residential buildings in US...Ch. 3 - total energy use in the US from Table 3.4 for 2011...Ch. 3 - Prob. 3.159PCh. 3 - A wind turbine with 20m diameter rotors spins at...Ch. 3 - Prob. 3.161PCh. 3 - Prob. 3.162PCh. 3 - A house is being designed to use a thick concrete...Ch. 3 - A solar pond with 20°C salt water, Cp=3.8kJ/kg-K...Ch. 3 - Prob. 3.165PCh. 3 - Prob. 3.166PCh. 3 - Prob. 3.167PCh. 3 - Prob. 3.168PCh. 3 - Prob. 3.169PCh. 3 - Prob. 3.170PCh. 3 - Prob. 3.171PCh. 3 - Prob. 3.172PCh. 3 - A piston cylinder has 0.1 kg water at x=0.5 ,...Ch. 3 - Prob. 3.174PCh. 3 - A piston/cylinder arrangement has the piston...Ch. 3 - Prob. 3.176PCh. 3 - Prob. 3.177PCh. 3 - Prob. 3.178PCh. 3 - Prob. 3.179PCh. 3 - Prob. 3.180PCh. 3 - Prob. 3.181PCh. 3 - Prob. 3.182PCh. 3 - A spherical balloon contains 2 kg of R-410A at 0°C...Ch. 3 - Prob. 3.184PCh. 3 - Prob. 3.185EPCh. 3 - Work as Fx has units of lbf ft. What is that in...Ch. 3 - Work in the expression in Eq. 3.18 or Eq. 3.22...Ch. 3 - Prob. 3.188EPCh. 3 - Prob. 3.189EPCh. 3 - You heat a gas 20 R at P=C . Which gas in Table...Ch. 3 - A piston motion moves a 50-lbm hammerhead...Ch. 3 - A pump pushes 35000ft3 of liquid water at 60 F up...Ch. 3 - Prob. 3.193EPCh. 3 - Prob. 3.194EPCh. 3 - Prob. 3.195EPCh. 3 - Prob. 3.196EPCh. 3 - Prob. 3.197EPCh. 3 - A car with tires of outer radius 12 in. drives...Ch. 3 - Prob. 3.199EPCh. 3 - Prob. 3.200EPCh. 3 - A nitrogen gas goes through apolytropic process...Ch. 3 - Prob. 3.202EPCh. 3 - Find the rate of conduction heat transfer per unit...Ch. 3 - The sun shines on a 1500-ft2 road surface so that...Ch. 3 - Prob. 3.205EPCh. 3 - Prob. 3.206EPCh. 3 - Prob. 3.207EPCh. 3 - Saturated vapor R-410A at 60 F in a rigid tank is...Ch. 3 - A containeris split in two equal volumes by a...Ch. 3 - Saturated vapor R-410A at 200 psia in a...Ch. 3 - A cylinder fitted with a frictionless piston...Ch. 3 - Prob. 3.212EPCh. 3 - Prob. 3.213EPCh. 3 - Prob. 3.214EPCh. 3 - Prob. 3.215EPCh. 3 - Prob. 3.216EPCh. 3 - Prob. 3.217EPCh. 3 - Prob. 3.218EPCh. 3 - Prob. 3.219EPCh. 3 - Prob. 3.220EPCh. 3 - Prob. 3.221EPCh. 3 - Prob. 3.222EPCh. 3 - A closed rigid container is filled with 3 lbm...Ch. 3 - Prob. 3.224EPCh. 3 - Prob. 3.225EPCh. 3 - Helium gas expands from 20 psia, 600 R, and 9ft3...Ch. 3 - Prob. 3.227EPCh. 3 - A cylinder fitted with a frictionless piston...Ch. 3 - Prob. 3.229EPCh. 3 - Prob. 3.230EPCh. 3 - Prob. 3.231EPCh. 3 - Prob. 3.232EPCh. 3 - A force of 300 lbf moves a truck at a speed of 40...Ch. 3 - Prob. 3.234EPCh. 3 - Water is in a piston/cylinder maintaining constant...Ch. 3 - A mass of 6 lbm nitrogen gas at 3600 R, V=C ,...Ch. 3 - Prob. 3.237EPCh. 3 - Prob. 3.238EPCh. 3 - Ammonia is contained in a sealed, rigid tank at 30...Ch. 3 - Prob. 3.240EP
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