According to the first law of thermodynamics, a book lying on a table can fly upwards on its own by using the internal energy of the table. True or False? a) True b) False
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According to the first law of
a) True
b) False
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- A heat engine under development is expected to transfer heat from reservoir A to reservoir B. Which is a requirement for the two reservoirs? A) The temperature of reservoir A must be greater than the temperature of reservoir B. B) The temperature of reservoir A must be equal to the temperature of reservoir B. C) The internal energy of reservoir A must be greater than the internal energy of reservoir B. D) internal energy of reservoir A must equal the internal energy of reservoir B.An ideal gas undergoes an isothermal process. Which of the following statements are true? a) No heat is added to or removed from the gas b) The internal energy of the gas remains constant c) The average kinetic energy of the molecules is constant d) Both A and B e) Both B and C f) A, B, and C are all trueProblem 1: Which of the following would violate the Second Law of Thermodynamics? Choose one that applies. OA 130 °F cup of hot coffee is placed on the table in a 75 °F room. Without any work being exerted and with no chemical reactions the cup of coffee heats up. O1,000 kJ of energy are available from a hot thermal reservoir. A heat engine converts 600 kJ to work and rejects 500 kJ to a lower temperature reservoir. A swinging pendulum gets lower and lower as friction takes energy out of the system. As a block slides down a rough incline heat is generated from friction. O Work is done and heat is made to go from a lower temperature reservoir to a higher temperature reservoir. O An inventor builds a device that is able to convert a specific amount of heat entirely to work in a thermodynamic cycle.
- An electrical power station requires 1.05 × 1014 J of heat transfer into the engine and has an efficiency of 42 %. a.) How much heat transfer occurs to the environment by the electical power station in J? b.) What is the ratio of heat transfer to the environment to work output? c.) How much work is done in J?Saved Help Save & Exit What is at room temperature for the kinetic energy storage mode for hydrogen gas in a cubic container whose sides have length L= 44 cm? The value of , is aw MacBook Pro G Search or type URL & %23 2$ 2 3 4 7 W E R Y U F G J K C V command opti command * a B2
- Which of the following can effectively lower the internal energy of a room? A A fan B A refrigerator with its door left wide open C An air - conditioner partially exposed to the atmosphere D A refrigerator with its door closed 9.13. 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, 3158 J of energy is transferred to a system consisting of 2.0 moles of an ideal gas. If the volume of this gas stays at a constant 2.8 L, calculate the change in internal energy of the gas.
- The temperature of 10 moles of an ideal gas is 1000 K. Compute the work done by the gas when it expands isothermally to three times its initial volume. Given: Boltzmann constant: k = 1.38 x 10–23 J/K, Ideal Gas Constant: R = 8.31 J/(mol K) A. 91300 J B. 9130 J C. 913 J D. 91 J E. 9 JA thermodynamic process that occurs so rapidly or occurs in a system that is so well insulated and no transfer of energy as heat occurs between the system and its environment is: A) Adiabatic B) isochoric C) isobaric D) isothermal1 Question 15 According to the first law of thermodynamics, applied to a gas, the increase in the internal energy during any process: 4 O is independent of the heat input O equals the heat input plus the work done by the gas O is independent of the work done on the gas O equals the work done by the gas minus the heat input equals the heat input minus the work done by the gas