Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 17, Problem 38P
You’re a lawyer with an unusual case. A whipped-cream can burst at a wedding, damaging the groom’s expensive tuxedo. The can warned against temperatures in excess of 50°C, and the manufacturer has evidence that it reached 60°C. You don’t contest this, but you point out that the can was only half full of cream when it burst, meaning that the gas propellant had available more than twice the volume it would in a full can, and that some of the propellant had already been used. You argue that the real safety criterion is pressure, and that the can’s maximum pressure wasn’t exceeded. Who’s right?
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Consider the two-sided chamber shown,where the right half has a volume of V = 490 L and the left half has a volume of 2V. The chamber has a seal which separates the right from the left half. The chamber is sealed and an ideal gas is pumped into the right side at a pressure P = 3.2 atm and temperature T = 72° C. The seal between the two sides is then opened.
(A) If the physical temperature decreases by a factor of 2 while the gas fills the chamber, what is the new pressure, in kilopascals?
(B) The chamber is then sealed again, trapping 2/3 of the gas molecules in the left side. The temperature of the left side is then doubled, back to the original temperature T. What is the pressure in the left side of the chamber now, in kilopascals?
Consider the two-sided chamber shown,where the right half has a volume of V = 490 L and the left half has a volume of 2V. The chamber has a seal which separates the right from the left half. The chamber is sealed and an ideal gas is pumped into the right side at a pressure P = 3.2 atm and temperature T = 72° C. The seal between the two sides is then opened.
(A) If the physical temperature decreases by a factor of 2 while the gas fills the chamber, what is the new pressure, in kilopascals?
(B)The chamber is then sealed again, trapping 2/3 of the gas molecules in the left side. The temperature of the left side is then doubled, back to the original temperature T. What is the pressure in the left side of the chamber now, in kilopascals?
Consider a gas having a molar mass of 55 g/mol. At 496 K, what is the average speed of the gas molecules in m/s?
Note: Be very careful with units here. In the average speed equation, the mass is in units of kg/molecule.
Chapter 17 Solutions
Essential University Physics (3rd Edition)
Ch. 17.1 - If you double the kelvin temperature of a gas,...Ch. 17.2 - You bring a pot of water to boil and then forget...Ch. 17.3 - The figure shows a donut-shaped object. If its...Ch. 17 - Prob. 1FTDCh. 17 - According to the ideal-gas law, what should be the...Ch. 17 - Prob. 3FTDCh. 17 - The average speed of the molecules in a gas...Ch. 17 - Suppose you start running while holding a closed...Ch. 17 - Prob. 6FTDCh. 17 - Your roommate claims that ice and snow must be at...
Ch. 17 - Whats the temperature of water just under the ice...Ch. 17 - Ice and water have been together in a glass for a...Ch. 17 - Which takes more heat: melting a gram of ice...Ch. 17 - The atmospheres of relatively low-mass planets...Ch. 17 - The triple point of water defines a precise...Ch. 17 - How is it possible to have boiling water at a...Ch. 17 - How does a pressure cooker work?Ch. 17 - Suppose mercury and glass had the same coefficient...Ch. 17 - A bimetallic strip consists of thin pieces of...Ch. 17 - Marss atmospheric pressure is about 1% that of...Ch. 17 - Prob. 18ECh. 17 - Whats the pressure of an ideal gas if 3.5 mol...Ch. 17 - Prob. 20ECh. 17 - (a) If 2.0 mol of an ideal gas are initially at...Ch. 17 - A pressure of 1010 Pa is readily achievable with...Ch. 17 - Whats the thermal speed of hydrogen molecules at...Ch. 17 - In which gas are the molecules moving faster:...Ch. 17 - How much energy does it take to melt a 65-g ice...Ch. 17 - It takes 200 J to melt an 8.0-g sample of one of...Ch. 17 - If it takes 840 kJ to vaporize a sample of liquid...Ch. 17 - Carbon dioxide sublimes (changes from solid to...Ch. 17 - Find the energy needed to convert 28 kg of liquid...Ch. 17 - A copper wire is 20 m long on a winter day when...Ch. 17 - You have exactly 1 L of ethyl alcohol at room...Ch. 17 - A Pyrex glass marble is 1.00000 cm in diameter at...Ch. 17 - At 0C, the hole in a steel washer is 9.52 mm in...Ch. 17 - Suppose a single piece of welded steel railroad...Ch. 17 - Prob. 35PCh. 17 - Prob. 36PCh. 17 - A compressed air cylinder stands 100 cm tall and...Ch. 17 - Youre a lawyer with an unusual case. A...Ch. 17 - A 3000-mL flask is initially open in a room...Ch. 17 - The recommended treatment for frostbite is rapid...Ch. 17 - A stove burner supplies heat to a pan at the rate...Ch. 17 - If a 1-megaton nuclear bomb were exploded deep in...Ch. 17 - Youre winter camping and are melting snow for...Ch. 17 - Prob. 44PCh. 17 - A refrigerator extracts energy from its contents...Ch. 17 - Climatologists have recently recognized that black...Ch. 17 - Repeat Example 17.4 with an initial ice mass of 50...Ch. 17 - How much energy does it take to melt 10 kg of ice...Ch. 17 - Water is brought to its boiling point and then...Ch. 17 - Prob. 50PCh. 17 - Whats the minimum amount of ice in Example 17.4...Ch. 17 - A bowl contains 16 kg of punch (essentially water)...Ch. 17 - A 50-g ice cube at 10C is placed in an equal mass...Ch. 17 - Prob. 54PCh. 17 - What power is needed to melt 20 kg of ice in 6.0...Ch. 17 - You put 300 g of water at 20C into a 500-W...Ch. 17 - If 4.5 105 kg of emergency cooling water at 10C...Ch. 17 - Describe the composition and temperature of the...Ch. 17 - A glass marble 1.000 cm in diameter is to be...Ch. 17 - Prob. 60PCh. 17 - A steel ball bearing is encased in a Pyrex glass...Ch. 17 - Fuel systems of modern cars are designed so...Ch. 17 - A rod of length L0 is clamped rigidly at both...Ch. 17 - Prob. 64PCh. 17 - A solar-heated house stores energy in 5.0 tons of...Ch. 17 - Show that the coefficient of volume expansion of...Ch. 17 - Waters coefficient of volume expansion in the...Ch. 17 - When the expansion coefficient varies with...Ch. 17 - Ignoring air resistance, find the height from...Ch. 17 - The timekeeping of a grandfather clock is...Ch. 17 - Prob. 71PCh. 17 - Prob. 72PCh. 17 - Figure 17.12 shows an apparatus used to determine...Ch. 17 - Prob. 74PCh. 17 - (a) Show that, for an ideal gas, the speed of...Ch. 17 - The Maxwell-Boltzmann distribution, plotted in...Ch. 17 - At high gas densities, the van der Waals equation...Ch. 17 - Prob. 78PPCh. 17 - Prob. 79PPCh. 17 - Because some pathogens can survive 120C...Ch. 17 - Prob. 81PP
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