4.5 kg of water at 36 °C is mixed with 4.5 kg of water at 60 ° C in a well-insulated container. Part A Estimate the net change in entropy of the system. Express your answer to two significant figures and include the appropriate units.

4.5 kg of water at 36 °C is mixed with 4.5 kg of water at 60 ° C in a well-insulated container. Part A Estimate the net change in entropy of the system. Express your answer to two significant figures and include the appropriate units.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 61P: The Carnot cycle is represented by the temperature-entropy diagram shown below. (a) How much heat is...

See similar textbooks

Similar questions

A sophomore with nothing better to do adds heat to 0.480 kg of ice at 0.00° C until it is all melted. Part A What is the change in entropy of the water? Express your answer with the appropriate units. µA ? ASı Value Units Submit Request Answer Part B The source of heat is a very massive body at a temperature of 25.0° C. What is change entropy this body? Express your answer with the appropriate units. HÁ ? AS2 = Value Units %3D Submit Request Answer Part C What is the total change in entropy of the water and the heat source? Express your answer with the appropriate units.
Can you help with subpart d 5. A Carnot engine works between two heat reservoirs at temperatures Thot= 301.0 K and Tcold= 220.0 K. a. What is its efficiency? b. If it absorbs 200.0 J from the hot reservoir during each cycle, how much work does it do per cycle? c. How much heat does it reject during each cycle? d. What is the coefficient of performace, COP, of this engine when it works as a refrigerator between the same two reservoirs?
Constar 4.5 kg of water at 36 °C is mixed with 4.5 kg of water at 60 ° C in a well-insulated container. Part A Estimate the net change in entropy of the system. Express your answer to two significant figures and include the appropriate units. HA J AS = 54 K Submit Previous Answers Request Answer X Incorrect; Try Again
Can you help with subpart d it is not correct 5. A Carnot engine works between two heat reservoirs at temperatures Thot= 301.0 K and Tcold= 220.0 K. a. What is its efficiency? 0.27 % b. If it absorbs 200.0 J from the hot reservoir during each cycle, how much work does it do per cycle? 54 J c. How much heat does it reject during each cycle? 146 J d. What is the coefficient of performace, COP, of this engine when it works as a refrigerator between the same two reservoirs? 3.72
Aheat engine utilizes a heat source at 590 °C and has a Carnot efficiency of 33 %. - Part A To increase the efficiency to 38 %, what must be the temperature of the heat source?7 Express your answer using two significat figures. Eνα ΑΣφ T - %3D Submit Request Answer Provide Feedback P Pearson MacBool
When 2.1 kg of water at 12.3 °C is mixed with 3.7 kg of water at 39.7 °C in a well-insulated container, what is the change in entropy of the system? Part A Make an estimate. Express your answer to two significant figures and include the appropriate units. HÁ ? AS = Value Units Submit Request Answer Part B Use the integral AS = [dQ/T. Express your answer to two significant figures and include the appropriate units. HA AS = Value Units Submit Request Answer
Using Thermodynamics and Work, Energy and Power A rubberized sphere contains carbon dioxide. If the initial radius of the sphere is 15cm:a. How much work is done if the carbon dioxide-filled sphere expanded to five times its originalvolume against the pressure at STP? Express your answer in L atm.b. Upon the expansion of the sphere, what is the kinetic energy of a single carbon dioxidemolecule if it travels across the diameter and covers it in 30ms? Assume that the spherecontains one mole of carbon dioxide. Express your answer in J.c. How much power can all the molecules in this sphere generate after 30s? Assume that thesphere contains one mole of carbon dioxide and that all molecules have the same kineticenergy. Express your answer in W. (Use the KE obtained from the previous required)
The heat of melting of ice at 1 atmosphere pressure and 0°C is 1.4363 kcal/mol. The volume of ice is 0.0196 liter and the volume of water is 0.018 liter. If 1 mole of ice is melted under these conditions, what will be a. The work done in cal? b. The change in internal energy in cal? c. The change in entropy in cal? Note Note that 1 literxatmosphere is equal to 101.325 joule. Sol": given Heat of melting ice at 1 atm pressure = 1.4363 kca kcal/ 2 = 1.4363 kcal/mole mole volume of ice = 0·0196 lts " water = 0.018 lts @ work done is define as w=pdv » w = P(V₁ hot W = 1 (0·018-00196) W = 0·0016 Cal Pay Kat Ans
Question B2i. Give an equation for the infinitesimal change in entropy, ??, of a system in terms of the heat transfer ??? and the temperature ? at which the heat transfer occurs. Explain the sign convention. ii. A litre of water at 20 °C is placed in a fridge at 5 °C. Calculate the change in entropy of the water, including the sign, once all the water has come into thermal equilibrium. iii. Calculate the change in entropy of the fridge from part ii, including the sign. iv. Demonstrate that the Second Law has been obeyed in the process described in ii and iii.
Using Thermordynamics and Work Theorem 0.5 moles of cinnamaldehyde gas that has an initial volume of ten liters expands under the following conditions: 185°F and 800mmHg external pressure. a. How much work is done? Express your answer in L atm. b. Assuming that the container is cylindrical with a base radius of 10cm and can only expand vertically, how much kinetic energy does a single molecule possesses if it travels from base to base of the expanded cylinder in 10μs? Express your answer in J.
Calculate the change in entropy for the following systems (it may be positive or negative, check your signs!). a. A heat reservoir of 423 K to which 5,918 J of heat is added. J/K b. 0.209 kg of water at 0 °C that freezes. kJ/K c. A 2.53 kg block of copper whose temperature increases from 24.4 °C to 84.3 °C. The specific heat of copper is 386 J/kg.K. J/K d. 7.00 mole of an ideal monatomic gas undergoing an isothermal expansion increasing its volume from 0.530 L to 2.57 L. J/K
The density of liquid nitrogen is 810 kg/m³. What is the entropy change of the nitrogen if 140 mL of liquid nitrogen boils away and then warms to 20°C at constant pressure? Express your answer with the appropriate units. AS = Submit μÅ Value Units Previous Answers Request Answer ?