Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
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Chapter 5, Problem 5.5P
Evaluate the dimensionless groups
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For a certain gas, R=0.267 kJ/kg∙K and k=1.384. (a) What is the value of specific heat at constant volume in kJ/kg∙K?
For a certain gas, R=0.277 kJ/kg-K and k=1.384.
If 32.55 kJ are transferred to this gas at constant pressure in Question 5, what are the resulting temperature and volume?
*Question 5:
For a certain gas, R=0.277 kJ/kg-K and k=1.384. What mass of this gas would occupy a volume of 0.475 m3 at 518.14 kPa and 27.8°C?
Given the following property data for H,0 designate
the region in T-v or P-v space (i.e., compressed
liquid, liquid-vapor mixture, superheated vapor, etc.)
and find the value(s) of the requested property or
properties. Use the tables in Appendix D or the NIST
database as necessary. Provide units with your
answers.
Chapter 5 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 5 - Evaluate the Reynolds number for flow over a tube...Ch. 5 - 5.2 Evaluate the Prandtl number from the following...Ch. 5 - Evaluate the Nusselt number for flow over a sphere...Ch. 5 - 5.4 Evaluate the Stanton number for flow over a...Ch. 5 - Evaluate the dimensionless groups hcD/k,UD/, and...Ch. 5 - 5.6 A fluid flows at 5 over a wide, flat plate 15...Ch. 5 - 5.7 The average Reynolds number for air passing in...Ch. 5 - Prob. 5.8PCh. 5 - When a sphere falls freely through a homogeneous...Ch. 5 - 5.10 Experiments have been performed on the...
Ch. 5 - 5.13 The torque due to the frictional resistance...Ch. 5 - The drag on an airplane wing in flight is known to...Ch. 5 - 5.19 Suppose that the graph below shows measured...Ch. 5 - Engine oil at 100C flows over and parallel to a...Ch. 5 - For flow over a slightly curved isothermal...Ch. 5 - Air at 20C flows at 1 m/s between two parallel...Ch. 5 - Air at 1000C flows at an inlet velocity of 2 m/s...Ch. 5 -
5.43 A refrigeration truck is traveling at 130...Ch. 5 - The air-conditioning system in a Chevrolet van for...Ch. 5 - Determine the rate of heat loss from the wall of a...
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- For a certain ideal gas R = 25.8 ft-lb/lb-R and k = 1.09 (a) What are the values of cp and cv? (b) What mass of this gas would occupy a volume of 15 cu ft and 75 psia and 80F? (c) If 30 Btu are transferred to this gas at constant volume in (b), what are the resulting temperature and pressure?arrow_forwardIf one mole of H2 gas occupies a rigid container with a capacity of 1000 litres and the temperature is raised from 27°C to 37°C, the change in pressure of the contained gas (round off to two decimal places), assuming ideal gas behaviour, is Pa. (R = 8.314 J/mol.K)arrow_forward4. For a certain ideal gas R = 25.8 ft.lb /lb °R and k =1.09 (a) What are the values of c, and c,? (b) What mass of this gas would occupy a volume of 15 cu ft at 75 psia and 80 °F? (c) If 30 Btu are transferred to this gas at constant volume in (b), what are the resulting temperature and pressure?arrow_forward
- An object is placed against the center of a spherical mirror and then moved 80An ideal gas at 14.7 °C and a pressure of 2.92 x 105 Pa occupies a volume of 3.40 m?. (a) How many moles of gas are present? (b) If the volume is raised to 5.33 m and the temperature raised to 31.0 °C, what will be the pressure of the gas? (a) Number Units (b) Number Units cm from it along the central axis as the image distance i is measured. The figure gives i versus object distance p out to ps 46 cm. What is the image distance when the object is on the central axis and 76 cm from the mirror?arrow_forward2. For a certain gas, R = 0.377KJ/kg.K and k = 1.384. (a)What are the values of c, and a, ? (b) What mass of this gas would occupy a volume of 0.552 m at 517.11 kPa and 36.7 deg. Celsius? (c) If 31.65 kJ is transferred to this gas at constant volume, what are the resulting temperature and pressure? Use 2kgmarrow_forwardProfessional divers sometimes use heliox, consisting of 79% helium and 21% oxygen by mole. Suppose a perfectly rigid scuba tank with a volume of 11.0 L contains heliox at an absolute pressure of 2.20 x 107 Pa at a temperature of 30.0°C. (a) How many moles of helium and how many moles of oxygen are in the tank? 75.9 mol mol helium noxygen + 20.2 (b) The diver goes down to a point where the sea temperature is 26.0°C while using a negligible amount of the mixture. As the gas in the tank reaches this new temperature, how much heat is removed from it (in kJ)? 5.5e+03 X kJarrow_forward
- For a certain polyatomic ideal gas the value R is 0.354 kJ/(kg.K). Determine its molecular weight ( W ), both specific heat at constant pressure ( Cp ) and at constant volume ( Cy ).arrow_forwardQ2. Consider a piston-cylinder device that contains liquid water at 1 MPa and 150 °C. The weights on top of the piston are removed one by one so that the pressure inside the cylinder decreases gradually (Fig. 3–18). Draw a property diagram that shows all the water states including phase change processes, which will go from compressed liquid to super-heated vapor while keeping the temperature constant in the system. P = 1 MPa T = 150°C Heatarrow_forwardIn a car lift used in a service station, pressure is transmitted by an incompressible liquid from a small piston of circular cross section with a radius of r1 = 5.00 cm to a second piston of radius r2 = 15.0 cm. Calculate the minimum force that must be exerted on the smaller piston to lift a car weighing 13300 N. Solution Relevant givens (check as many as possible): O 1.672 x 1027 kg O 25m O 15.0cm 12K 9.109 x 10-31 kg O 1.2 x 10- /K O 4186 J/kg/m3 O 5.0 cm O 1.602 x 10-19C O 37 °Carrow_forward
- A steam drum contains steam having an 86% quality. Assuming that the densityof Liquid part is 989kg/m3 and that of the vapor part is 1.23kg/m3, Estimate thespecific volume of the steam. (Note: 86% quality indicates the mass in vapor state)arrow_forwardA quantity of 0.44 moles of air enters a diesel engine at a pressure of 148 kPa and at a temperature of 60 oC. Find the volume of this quantity of air in unit of L. Take the gas constant R = 8.31 J mol-1 K-1.arrow_forwardA steam drum contains steam having an 86% quality. Assuming that the density of Liquid part is 989kg/m^3 and that of the vapor part is 1.23kg/m^3, Estimate the specific volume of the steam. (Note: 86% quality indicates the mass in vapor state). Draw the figure or free body diagram, and its step by step explanation.arrow_forward
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