Which of the following equations correctly relate the change in entropy, reversible heat, and Kelvin temperature of a process? Select all that apply:
qrev=ΔS×T
T=qrev×ΔS
ΔS=qrev×T
ΔS=qrevT
Change in entropy is defined as:
ΔS = qrev / T
So,
qrev = ΔS*T
Answer: option 1
Which of the following equations correctly relate the change in entropy, reversible heat, and Kelvin temperature...
Which of the following equations correctly relate the change in entropy, reversible heat, and Kelvin temperature of a process? Select all that apply: rev = AS XT T = 4re X AS AS = re XT AS =
2. Discuss the Carnot Cycle & Efficiency, Kelvin Temperature Scale, Definition of Eutropy Change, Tds Equations, Euthalpy-Entropy Diagrams (Mollier), Steady State Mass, Energy & Entropy Rate Balances for Coutrol Volumes, Rankine Cycle, Vapor Power, Refrigeration Cycle, and Vapor-Compression Heat Pump
O ENTROPY AND FREE ENERGY Calculating entropy change from reversible heat flow The heat of vaporization AH, of acetone (OC(CH3),) is 32.0 kJ/mol. Calculate the change in entropy AS when 56. g of acetone condenses at 56.5 °C. Be sure your answer contains a unit symbol. Round your answer to 2 significant digits. . μ ロロ x
Two moles of an ideal gas undergo a reversible isothermal expansion from 2.41×10−2 m3 to 4.42×10−2 m3 at a temperature of 26.7 ∘C. What is the change in entropy ΔS of the gas? Express your answer numerically in joules per kelvin.
Consider a reversible heat engine that employs a hot reservoir at a temperature of 660 K and a cold reservoir at 230 K. (a) What is the entropy change of the hot reservoir during a period in which 4300 J is extracted from the hot reservoir? (b) What is the change in the entropy of the cold reservoir? (c) Find the change in the entropy of the engine itself during this time.
True or False (Problems 1 through 10) 1. The change in entropy of a closed system is the same for every process between two specified states 2. The entropy of a fixed amount of an incompressible substance increases in every process for which temperature increases 3. A process that violates the second law of thermodynamics violates the first law of thermodynamics. 4. When a net amount of work is done on a closed system undergoing an internally reversible process, a...
It can be shown that as a mass m with specific heat c changes temperature from Ti to Tf its change in entropy is ΔS=mcln(Tf/Ti) if the temperatures are expressed in kelvin. Suppose you put 78 g of milk at 278 K into an insulated cup containing 290 g of coffee at 355 K, and that each has the specific heat of water. The system comes to an equilibrium temperature of 339 K. Part A What is the entropy change...
i got this question wrong. the book previously said that the units of entropy are J/(mol*K). you can get mol with the grams that they gave, so why not use it? Example: If, in a reversible process, 6.66 x 10 J of heat is used to change a 200 g block of ice to water at a temperature of 273 K, what is the change in the entropy of the system? (Note: The heat of fusion of ice = 333...
Which of the following statements are true? Check all that apply. A. The entropy of a system can not increase in a reversible adiabatic process. B. The entropy of the surroundings can not increase in a reversible adiabatic process. C. The entropy of the surroundings can not increase in an adiabatic process. D. The entropy of a system can not increase in an adiabatic process.
Provide an explanation as well for the following questions. 1 Both energy and entropy can be transferred between a system and surroundings by heat, work, and mass flow True or False 2. An actual turbine undergoes an adiabatic process generating entropy due to irreversibilities. The generated entropy a) causes the turbine’s exit temperature to be lower than if the turbine were reversible. b) causes the turbine’s exit temperature to be higher than if the turbine were reversible. c) causes the...