College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 39GP
Human entropy. A person having skin of surface area 1.85 m2 and temperature 30.0°C is resting in an insulated room where the ambient air temperature is 20.0°C. In this state, a person gets rid of excess heat by
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College Physics (10th Edition)
Ch. 16 - Under what conditions will the entropy of a gas...Ch. 16 - In what ways is a heat pump different from (or...Ch. 16 - Prob. 3CQCh. 16 - A growing plant creates a highly complex and...Ch. 16 - Why must a room air conditioner be placed in a...Ch. 16 - If you pour a cup of hot water into a cup of cold...Ch. 16 - How can the thermal conduction of heat from a hot...Ch. 16 - How can the free expansion of a gas into a vacuum...Ch. 16 - Does the second law of thermodynamics say that...Ch. 16 - Prob. 10CQ
Ch. 16 - Prob. 11CQCh. 16 - What would be the efficiency of a Carnot engine...Ch. 16 - The first law of thermodynamics is sometimes...Ch. 16 - Would it be more economical to run a refrigerator...Ch. 16 - An insulated box has a carrier that confines a gas...Ch. 16 - Prob. 2MCPCh. 16 - Carnot engine A operates between temperatures of...Ch. 16 - Prob. 4MCPCh. 16 - Prob. 5MCPCh. 16 - You want to increase the efficiency of a Carnot...Ch. 16 - Prob. 7MCPCh. 16 - You perform 100 J of work on a refrigerator that...Ch. 16 - If you mix cold milk with hot coffee in an...Ch. 16 - A glass of water left outside on a cold night...Ch. 16 - Prob. 11MCPCh. 16 - Prob. 12MCPCh. 16 - A coal-fired power plant that operates at an...Ch. 16 - Each cycle, a certain heat engine expels 250 J of...Ch. 16 - A diesel engine performs 2200 J of mechanical work...Ch. 16 - An aircraft engine has a heat efficiency of e =...Ch. 16 - A certain nuclear power plant has a thermal...Ch. 16 - Figure 16.15 shows a pV diagram for a heat engine...Ch. 16 - The pV diagram in Figure 16.16 shows a cycle of a...Ch. 16 - A gasoline engine. A gasoline engine takes in 1.61...Ch. 16 - A gasoline engine has a power output of 180 kW...Ch. 16 - In one cycle, a freezer uses 785 J of electrical...Ch. 16 - A refrigerator has a coefficient of performance of...Ch. 16 - Prob. 12PCh. 16 - A freezer has a coefficient of performance of...Ch. 16 - A cooing unit for chilling the water of an...Ch. 16 - A Carnot engine whose high-temperature reservoir...Ch. 16 - A heat engine is to be built to extract energy...Ch. 16 - A Carnot engine is operated between two heat...Ch. 16 - A Carnot engine has an efficiency of 59% and...Ch. 16 - An ice-making machine operates as a Carnot...Ch. 16 - A Carnot freezer that runs on electricity removes...Ch. 16 - Set Up: For an engine, W and QH positive and QC is...Ch. 16 - A sophomore with nothing better to do adds heat to...Ch. 16 - A 4.50 kg block of ice at 0.00C falls into the...Ch. 16 - You decide to take a nice hot bath but discover...Ch. 16 - A crucible contains 0.1 kg of liquid lead that is...Ch. 16 - Three moles of an ideal gas undergo a reversible...Ch. 16 - Entropy change due to driving. Premium gasoline...Ch. 16 - Entropy change from a doughnut. A typical doughnut...Ch. 16 - Solar collectors. A well-insulated house of...Ch. 16 - Prob. 30PCh. 16 - An experimental power plant at the Natural Energy...Ch. 16 - Solar water heater. A solar water heater for...Ch. 16 - You are designing a Carnal engine that has 2 mol...Ch. 16 - A heat engine takes 0.350 mol of an ideal diatomic...Ch. 16 - As a budding mechanical engineer, you are called...Ch. 16 - Prob. 36GPCh. 16 - A Carnot engine operates between two heat...Ch. 16 - An engineer is working with a Carnot engine that...Ch. 16 - Human entropy. A person having skin of surface...Ch. 16 - A typical coal-fired power plant generates 1000 MW...Ch. 16 - A human engine. You decide to use your body as a...Ch. 16 - One end of a copper rod is immersed in boiling...Ch. 16 - The pV diagram in Figure 16.19 shows a heat engine...Ch. 16 - Passage Problems Power from the sea. Ocean thermal...Ch. 16 - What is the change in entropy of the ammonia...Ch. 16 - Compare the entropy change of the warmer water to...Ch. 16 - If the proposed plant is built and produces 10 MW...
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- (a) On a winter day, a certain house loses 5.00108J of heat to the outside (about 500,000 Btu). What is the total change in entropy due to this heat transfer alone, assuming an average indoor temperature of 21.0C and an average outdoor temperature of 5.00C ? (b) This large change in entropy implies a large amount of energy has become unavailable to do work. Where do we find more energy when such energy is lost to us?arrow_forwardA sealed container holding 0.500 kg of liquid nitrogen at its boiling point of 77.3 K is placed in a large room at 21.0C. Energy is transferred from the room to the nitrogen as the liquid nitrogen boils into a gas and then warms to the rooms temperature. (a) Assuming the rooms temperature remains essentially unchanged at 21.0C, calculate the energy transferred from the room to the nitrogen. (b) Estimate the change in entropy of the room. Liquid nitrogen has a latent heat of vaporization of 2.01 105 J/kg. The specific heat of N2 gas at constant pressure is CN2 = 1.04 103J/kg K.arrow_forwardAssume a sample of an ideal gas is at room temperature. What action will necessarily make the entropy of the sample increase? (a) Transfer energy into it by heat. (b) Transfer energy into it irreversibly by heat. (c) Do work on it. (d) Increase either its temperature or its volume, without letting the other variable decrease. (e) None of those choices is correct.arrow_forward
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