Why is the following situation impossible ? A new diesel engine that increases fuel economy over previous models is designed. Automobiles fitted with this design become incredible best sellers. Two design features are responsible for the increased fuel economy: (1) the engine is made entirely of aluminum to reduce the weight of the automobile, and (2) the exhaust of the engine is used to prewarm the air to 50°C before it enters the cylinder to increase the final temperature of the compressed gas. The engine has a c ompression ratio —that is, the ratio of the initial volume of the air to its final volume after compression—of 14.5. The compression process is adiabatic, and the air behaves as a diatomic ideal gas with γ = 1.40.

BuyFind

Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399
BuyFind

Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399

Solutions

Chapter
Section
Chapter 21, Problem 21.30P
Textbook Problem

Why is the following situation impossible? A new diesel engine that increases fuel economy over previous models is designed. Automobiles fitted with this design become incredible best sellers. Two design features are responsible for the increased fuel economy: (1) the engine is made entirely of aluminum to reduce the weight of the automobile, and (2) the exhaust of the engine is used to prewarm the air to 50°C before it enters the cylinder to increase the final temperature of the compressed gas. The engine has a compression ratio—that is, the ratio of the initial volume of the air to its final volume after compression—of 14.5. The compression process is adiabatic, and the air behaves as a diatomic ideal gas with γ = 1.40.

Expert Solution

Want to see the full answer?

Check out a sample textbook solution.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects.

Chapter 21 Solutions

Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 21 - A sample of gas with a thermometer immersed in the...Ch. 21 - Ail ideal gas is contained in a vessel at 300 K....Ch. 21 - Which of the assumptions below is not made in the...Ch. 21 - Hot air rises, so why does it generally become...Ch. 21 - Why does a diatomic gas have a greater energy...Ch. 21 - When alcohol is rubbed on your body, it lowers...Ch. 21 - What happens to a helium-filled latex balloon...Ch. 21 - Which is denser, dry air or air saturated with...Ch. 21 - One container is filled with helium gas and...Ch. 21 - Daltons law of partial pressures states that the...Ch. 21 - (a) How many atoms of helium gas fill a spherical...Ch. 21 - A cylinder contains a mixture of helium and argon...Ch. 21 - In a 30.0-s interval, 500 hailstones strike a...Ch. 21 - In an ultrahigh vacuum system (with typical...Ch. 21 - A spherical balloon of volume 4.00 103 cm3...Ch. 21 - A spherical balloon of volume V contains helium at...Ch. 21 - A 2.00-mol sample of oxygen gas is confined to a...Ch. 21 - Oxygen, modeled as an ideal gas, is in a container...Ch. 21 - Calculate the mass of an atom of (a) helium, (b)...Ch. 21 - The rms speed of an oxygen molecule (O2) in a...Ch. 21 - A 5.00-L vessel contains nitrogen gas at 27.0C and...Ch. 21 - A 7.00-L vessel contains 3.50 moles of gas at a...Ch. 21 - In a period of 1.00 s, 5.00 1023 nitrogen...Ch. 21 - In a constant-volume process, 209 J of energy is...Ch. 21 - A sample of a diatomic ideal gas has pressure P...Ch. 21 - Review. A house has well-insulated walls. It...Ch. 21 - A 1.00-mol sample of hydrogen gas is healed at...Ch. 21 - A vertical cylinder with a heavy piston contains...Ch. 21 - Calculate the change in internal energy of 3.00...Ch. 21 - A 1.00-L insulated bottle is full of tea at 90.0C....Ch. 21 - Review. This problem is a continuation of Problem...Ch. 21 - A certain molecule has f degrees of freedom. Show...Ch. 21 - In a crude model (Fig. P21.23) of a rotating...Ch. 21 - Why is the following situation impossible? A team...Ch. 21 - The relationship between the heal capacity of a...Ch. 21 - A 2.00-mol sample of a diatomic ideal gas expands...Ch. 21 - During the compression stroke of a certain...Ch. 21 - How much work is required to compress 5.00 mol of...Ch. 21 - Air in a thundercloud expands as it rises. If its...Ch. 21 - Why is the following situation impossible? A new...Ch. 21 - During the power stroke in a four-stroke...Ch. 21 - Air (a diatomic ideal gas) at 27.0C and...Ch. 21 - A 4.00-L sample of a diatomic ideal gas with...Ch. 21 - An ideal gas with specific heal ratio confined to...Ch. 21 - Helium gas is in thermal equilibrium with liquid...Ch. 21 - Fifteen identical particles have various speeds:...Ch. 21 - One cubic meter of atomic hydrogen at 0C at...Ch. 21 - Two gases in a mixture diffuse through a filter at...Ch. 21 - Review. At what temperature would the average...Ch. 21 - Consider a container of nitrogen gas molecules at...Ch. 21 - Assume the Earths atmosphere has a uniform...Ch. 21 - From the MaxwellBoltzmann speed distribution, show...Ch. 21 - The law of atmospheres states that the number...Ch. 21 - Eight molecules have speeds of 3.00 km/s, 4.00...Ch. 21 - A small oxygen tank at a gauge pressure of 125 atm...Ch. 21 - The dimensions of a classroom are 4.20 m 3.00 m ...Ch. 21 - The Earths atmosphere consists primarily of oxygen...Ch. 21 - The mean fret path l of a molecule is the average...Ch. 21 - An air rifle shoots a lead pellet by allowing high...Ch. 21 - In a sample of a solid metal, each atom is free to...Ch. 21 - A certain ideal gas has a molar specific heat of...Ch. 21 - The compressibility of a substance is defined as...Ch. 21 - Review. Oxygen at pressures much greater than 1...Ch. 21 - Examine the data for polyatomic gases in Table...Ch. 21 - Model air as a diatomic ideal gas with M = 28.9...Ch. 21 - Review. As a sound wave passes through a gas, the...Ch. 21 - Twenty particles, each of mass m0 and confined to...Ch. 21 - In a cylinder, a sample of an ideal gas with...Ch. 21 - As a 1.00-mol sample of a monatomic ideal gas...Ch. 21 - A sample consists of an amount n in moles of a...Ch. 21 - When a small panicle is suspended in a fluid,...Ch. 21 - A vessel contains 1.00 104 oxygen molecules at...Ch. 21 - A pitcher throws a 0.142-kg baseball at 47.2 m/s....Ch. 21 - The latent heat of vaporization for water at room...Ch. 21 - A sample of a monatomic ideal gas occupies 5.00 L...Ch. 21 - Consider the particles in a gas centrifuge, a...Ch. 21 - For a Maxwellian gas, use a computer or...Ch. 21 - A triatomic molecule can have a linear...Ch. 21 - Using the MaxwellBoltzmann speed distribution...Ch. 21 - On the PV diagram for an ideal gas, one isothermal...Ch. 21 - In Beijing, a restaurant keeps a pot of chicken...Ch. 21 - Review, (a) H it has enough kinetic energy, a...Ch. 21 - Using multiple laser beams, physicists have been...Ch. 21 - Equations 20.43 and 20.44 show that vrms vavg for...Ch. 21 - A cylinder is closed at both ends and has...

Additional Science Textbook Solutions

Find more solutions based on key concepts
Which of the following passes through the large intestine mostly unabsorbed? a. starch b. vitamins c. minerals ...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What gives amino acids their individual properties?

Biology: The Dynamic Science (MindTap Course List)

What is a climax communtiy?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin