A Carnot refrigerator operates with an efficiency n = 0.66666666666667 between a hot reservoir at temperature T₁ = 50 K and a cold reservoir at temperature T2. Calculate the temperature T2 of the cold reservoir. Select one: O a. T₁ = 150.0 O b. T₁ 25.0 O c. T₁ = 16.666666666667 O d. T₁20.0 =

A Carnot refrigerator operates with an efficiency n = 0.66666666666667 between a hot reservoir at temperature T₁ = 50 K and a cold reservoir at temperature T2. Calculate the temperature T2 of the cold reservoir. Select one: O a. T₁ = 150.0 O b. T₁ 25.0 O c. T₁ = 16.666666666667 O d. T₁20.0 =

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A9
6. Two kg of air is compressed in an insulated cylinder from 400 kPa to 15000 kPa. if the initial temperature is 200˚C , Assume adiabatic process , CV=0.707 KJ/Kg.K , γ=1.4. The final temperature and the work necessary are:
5. A Carnot refrigerator runs between a cold reservoir at temperature Tc and a hot reservoir at temperature Tµ. You want to increase its coefficient of performance. Of the following, which change results in the greatest increase in the coefficient? The value of AT is the same for all changes. a. Raise the temperature of the hot reservoir by AT b. Raise the temperature of the cold reservoir by AT c. Lower the temperature of the hot reservoir by AT d. Lower the temperature of the cold reservoir by AT
QUESTION 7 Consider a molecule with 8 degrees of freedom. Select the heat capacity at constant volume of an ideal gas containing N of these molecules. a. 8NKT b. 8Nk OC. 4NKT d. 4NK O e. (3/2) Nk O f. (3/2) NkT Click Save and Submit to saue and submir Click Save All ansuers to save all answers:
13. The temperatures To of the cold reservoirs and the temperatures T, of the hot reservoirs for four Carnot heat engines are engine 1: Tc = 400K and T₁ = 500K engine 2: T = 500K and T₁ = 600K engine 3: Tc = 400K and T₁ = 600K engine 4: Tc = 600K and TH = 800K Rank these engines according to their efficiencies, least to greatest. A. 1, 2, 3, 4 B. 1 and 2 tie, then 3 and 4 tie C. 2, 1, 3, 4 D. 1, 2, 4, 3 E. 2, 1, 4, 3
ONe mole of an ideal gas first undergoes an isothermal expansion at a tempreture Ti = 500 K to 2 times its original volume . The tempreture is then reduced in an isochoric process to T2=300K . An isothermal compression otakes the gas back to its original volume and a final isochoric process returns the system to temperature T1 . How much heat is exchangeed between the system and its surroundings ? a. Q=1153J b. Q=-1153j c. Q=2816j d.-2816j
42. An ideal gas at P 2.50 X 10 Pa and T isothermally from 1.25 m' to 2.75 m'. The gas then returns to its original state through a two-part process: constant-pressure followed by constant-volume. a. G Draw a PV diagram for this gas. b. C What is the change in thermal energy? c. N Find the work done by the environment on the gas. d. N Find the heat that flows into the gas. 295 K expands %3D
Suppose an OTEC system operates with surface water at 22 °Cand deep water at 4.0 °C. What is the maximum efficiency thissystem could have?A. 6.10% B. 8.20% C. 9.40% D. 18.0%
A power plant has been proposed that would make use of the temperature gradient in the ocean. They system is to operate between 24.0°C (surface water temperature) and 4.95°C (water temperature at a depth of about 1 km). a. What is the maximum efficiency of such a system? Describe the process that would be used to get this maximum efficiency. b. If the useful power output of the plant is 80.0 MW, how much energy is absorbed per hour?
86. D A lawnmower engine with an efficiency of 0.22 rejects 9900 J of heat every second. What is the magnitude of the work that the engine does in one second?
An ideal gas is taken through a process described in the shown figure. How much work is done by the expanding gas in this process? (note that a = 4500, Volume is measured in m^3) O P=aV1.5 Select one: O a. 220 kJ E O b. 549 kJ O c. 440 kJ d. 336 kJ e. 41 kJ O 4 I 7.5 V
10 During an isothermal process at 88°F, the pressure on 8 lb of air drops from 80 psia to 5 psig. Determine: a. The non-flow and steady flow work. Ans. 421.2 Btu, 421.2 Btu b. The heat and change in internal energy and change in enthalpy. Ans. 421.2 Btu, 0, 0 C. The change in entropy. Ans. 0.7686 Btu/°R