The entropy of the universe is continually on the increase. A. Correct B. Incorrect
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The entropy of the universe is continually on the increase.
A. Correct
B. Incorrect
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- A hot reservoir at 1700C transfers 400 kJ of heat to a cold resevoir at 500 C. What is the total change in entropy? a. 1,210 J/K b. 335 J/K c. 5,560 J/K d. 130 J/K e. 0.000 J/K3 moles of O2 at 1 atm and 500K expands isothermally to 0.3 m3. What is the change in entropy of the gas? a) 22.23 J/K b) 7.41 J/K c) -7.41 J/K d) -22.23 J/KHomework 6 Problem 4: A mass m of water is heated reversibly from temperature T1 to T2 at a constant pressure of P. In this problem, we are going to determine an expression for the change in entropy, ΔS.Assume we can heat the given water infinitesimally slowly so that the process is reversible. Therefore, heat in any infinitesimal step is given by the following: dQ = mc dT, where c is the specific heat and is constant. Part (a) Write an expression for the change in entropy ΔS for the system. Part (b) Calculate the change in entropy in cal/K for a sample of water with mass m = 1.6 kg and changing temperature from T1 = 25.6°C to T2 = (25.6+10)°C. The specific heat c of water is 1,000 cal/kg/K. ΔS = ______
- During one complete cycle of a heat engine process, which of the following quantities is nonzero? a. The change in internal energy b. The change in volume. c. The work done d. The change in pressure e. The change in temperatureOn a cold day, 17400 J of heat leaks out of a house. The inside temperature is 24.0° C, and the outside temperature is -13° C. What is the increase in the entropy of the universe that this heat loss produces?2
- 9. Is the entropy of a bag of popcorn greater than, less than, or equal to the entropy of the kernels of corn before popping? Explain.Which of the following changes (there may be more than one) would increase the maximum theoretical efficiency of a heat engine?A. Increase TH B. Increase TC C. Decrease TH D. Decrease TC11. One-dimensional gas. Consider an ideal gas of N particles, each of mass M, confined to a one-dimensional line of length L. Find the entropy at tempera- ture r. The particles have spin zero.
- 3) Consider a system consisting of one particle with two states, one of energy 0 and one of energy +ɛ. a) Write down the partition function Z for this system. b) Show that the average energy for this system can be written as#2. Suppose 2.35 moles of an ideal gas expands to twice its volume isothermally at 298 K. A) How much work is done by the gas? B) Show the work done on a pressure-volume (P-V) graph C) What is the change in entropy of the gas?A- The Physicist's term for the amount of disorder is entropy (True or False) B-Thermo Dynamic means the movement of heat (True or False)