3.Calculate the entropy changes of system and surroundings for the case of freezing of supercooled liquidsilver at 1073 K. The melting point of silver is 1234 K and the heat of fusion is Hf = 11.2 kJ/mol.= 30.5.J / mol / Kand C = 21.2+ 8.55×10°T+1.5×10°T-J / mol / K. HINT: Assume that the samefunction for cp=f(T) can be used for the liquid silver even below melting point.

Given data: Cps=30.5 J/mol.KCps=21.1+8.55×10-3T+1.5×10-3T-2 J/mol.KTfs=1073 KTms=1234 K Need to…

Answered: 3. Calculate the entropy changes of…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Calculate the entropy changes of the system and surrounding for the case of isothermal freezing of one mole of supercooled liquid silver at 804°C, when the surrounding are also at the same temperature.
Carbon dioxide (molar mass 44 kg/kmol) expands rever sibly in a perfectly thermally insulated cylinder from 3.7 bar, 220 °C to a volume of 0.085 m'. If the initial volume occupied was 0.02 m', calculate the gas constant, adiabatic index, final pressure and work input. Assume nitrogen to be a perfect gas and take cv = 0.63 k J /kg K. Assessor's Signature Moderator's Signature
4. GoBrownsite is an obscure element with a molar mass of 126.2 grams per mol. Below is the cooling curve for GoBrownsite. How much energy needs to be removed from a 250.0 g sample of GoBrownsite knowing the following. Heat of Condensation AH = -165 kJ/°C • Specific heat of liquid GoBrownsite = 197 kJ/g-°C Heat of Freezing AH = - 231 kJ/°C Cooling Curve 80 e) to (1) 60 40 20 -20 Temperature 40 -60 -80 -100 (1) to (s) -120 Time
Soda from a ms=12oz can at temperature Ts=16 degrees celcius is poured in its entirety into a glass containing a mass mi=0.14kg amount of ice at temperature Ti=-18.5 degrees celcius. Assume that ice and water have the following specifc heats: ci=2090J/(kg*C) and cs=4186 J/(kg*C), and the latent heat of fusion of ice is Lf=334 kJ/kg. In this problem you can assume that 1kg of either soda or water corresponds to 35.273oz. a.) in degrees celcius, what is the final temp of the mixture? b.) find an expression for how much of the ice has melted. c.) in kg, how much of the ice has melted?
NOTE: Complete solution and show the derivation/cancellation of units. N m An ideal gas has a gas constant of 319.8 kg K and a gas ratio of 1.26. Calculate the heat rejected per kg of gas: A. when the gas is contained in a rigid vessel at 3 bar and 315°C and then cooled until the pressure falls to 1.5 bar. B. when the gas enters a pipeline at 280°C and flows steadily at constant pressure to the end of the pipe where the temperature is 20°C.
a tray of liquid water is placed in a freezer where it cools from 20 deg C to "-5" deg C. what is the total amount of energy needed to freeze per unit of liquid water? the specific heat of ice is half of the specific heat of liquid water. the latent heat of fusion for water is 335 kj/kg include diagram
1. (a) Explain the physical process represented by the equation below. Why is increasing? Hence define Equivalent Potential Temperature. L T Ws dw s = Cp 0e ! de Ө (b) Thus, explain why the adiabatic liquid water content (LWC) is greater than the measured LWC inside a cumulus cloud.
Define “entropy” and discuss some of its implications;
2. The gas expanding in the combustion space of a reciprocating engine has an initial pressure of 5o bar and an initial temperature of 1623 C. The initial volume is 50000 mm' and the gas expands through a volume ratio of 20 according to the law pV = constant. Calculate w and AU Take R = 270 J/Kg K and C, = 800 J/Kg K. Assume n = 1.38
How much heat is needed to completely vaporized 100 kg of ice at -10 C if the pressure held constant 200kPa. latent heat of fusion at 200 kpa is 320 kj/kg latent heat of vaporization at 200 kpa is 2 202 kjkg. show t.s Diagram and all units.
V. W. Th To %3D Room temperature T = 293 K V V. Vp The gas volume changes from Vp to Va at constant temperature T. The cartoon on the right shows a piston of gas undergoing this compression while submerged in a container of room temperature water, which acts as a reservoir. The initial state of this process is a piston containing 2 moles of a monatomic gas at Tc = 293 K (room temperature water) and volume V = a 1.0 m. The gas is compressed until V, = 0.2 m. During the compression, the heat bath of room temperature water maintains the temperature of the gas at T 293 K. Calculate the work done in joules by the gas during this process. Do not include units in your answer. Be careful to use the standard sign convention for work done by the gas. Write your numerical answer in normal form as described above in the instructions to this worksheet.
CHAPTER 3. Volumetric Properties of Pure Fluids 24 3.42. For methyl chloride at 100°C the second and third virial coefficients are: B -242.5 cm3.mol -1 C= 25,200 cmo.mol- Calculate the work of mechanically reversible, isothermal compression of 1 mol of methyl chloride from 1 bar to 55 bar at 100°C. Base calculations on the following forms of the virial equation: tot В С + V 32(a) ताी deal z=1+tv V2 (b) Z 1 B'P + C'P2 E0.0- Grst 130 С -В2 В and C'= В'" where ro boap A BEE 11 (RT)2 RT faups nisinos Why don't both equations give exactly the same result? HOS & BRIGE als A C 1 43 44

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