Stefan-Boltzman law whichdescribes the radiation heat transferstates that, it is proportional to (where,t = temperature in °C T = absolutetemperature in °K)A. +4T4B.C.D.O1t41T4

There are three modes of heat transferConduction : Heat transfer due to movement of molecules within…

Answered: Stefan-Boltzman law which describes the…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Natural Convection Cooling of an Orange. An orange 102 mm in diameter having a surface temperature of 21.1°C is placed on an open shelf in a refriger- ator held at 4.4°C. Calculate the heat loss by natural convection, neglecting radiation. As an approximation, the simplified equation for vertical planes can be used with L replaced by the radius of the sphere (M1). For a more accurate correlation, see (S2).
Example 3 : Suppose that 1 kg of saturated water vapor at 100C is condensed to a saturated liquid at 100 C in a constant-pressure process by heat transfer to the surrounding air, which is at 25C. What is the net increase in entropy of the water plus surroundings?
14. The following are physical quantities necessary to determine the change in free energy, except A. concentration B. entropy C. temperature D. enthalpy
The expansion of a hypothetical closed system takes place at a constant pressure with no change in its kinetic and potential energies. Prove that the heat absorption by this system is equal to the change in enthalpy.
Choose the correct option: 6. To which concept does the following definition belong? "Energy that is transferred from a hotter object to a colder one" (Brown et al, 1998: 146) a) Heat b) Temperature c) Heat energy d) Thermal energy
Explain with a sentence in the framework of a strategy why a correction factor is used in logarithmic temperature difference calculations in heat exchanger calculations.
Q) An apple has been put into a freezer at (-13°C) to be cooled. Initially, the apple is at a uniform temperature of 23°C. The convection heat transfer coefficient on its surface is 7 W/m2.°C. Assuming the apple as a sphere having a diameter of 6.5-cm and taking its properties as p = 930 kg/m3, cp = 3010 J/kg-°C, and k = 0.490 W/m°C, determine; (a) the center temperature of the apple in 30 minutes, (b) the actual amount of heat transfer from the apple, and (c) the final equilibrium temperature of the apple. Hint: consider the temperature is a function of location and time.
3
Heat transfer takes place as per - O Zeroth law of Thermodynamics First law of Thermodynamics Second law of Thermodynamics Third law of Thermodynamics O None of these
Question 2: Show how the Clausius Inequality can be reduced to the definition of entropy
P (kPa) Isotherm 160 V (m³) 70 380 The work in kJ for the constant-temperature process is O -113898.9 O -102853.9 O -152666.7 O -187522.3
For a refrigerator designed to work stably, reversible as shown. Prove that the energy efficiency factor of this refrigerator is:

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Stefan-Boltzman law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in °K) A. B. O T4 C. D. 1 -| t4 1 T4